I'd say no and will explain my opinion in this post, but I felt like formulating the topic title as a question to open this thread up to discussion from people who might have a different opinion.
I do not question that buffs for Admiral Hipper and Prinz Eugen were required, I'm questioning whether they actually made these ships worth playing. I consider both to be the most irrelevant cruisers at T8 still and a chore to play, which is sad for Hipper, but utterly disastrous for Prinz Eugen, which costs money after all. Mainly, I think this comes down to two things:
Lack of effective dpm.
Highly situational armour scheme.
What do I mean by that?
Well, Hipper, like most things German in this game, has HE that has high pen and low damage and fire chance and AP that has high damage and pretty low penetration. Which in practice means, unless you have broadsides to wreck, the ship basically relies on spamming HE, which has as its sole ray of light that it can pen 50 mm of armour. Hipper has of all T8 cruisers the least amount of guns, has a very average reload time and the HE shells have a staggering 2,500 damage potential. Just to put this into perspective, Charles Martel and Baltimore as average heavy cruisers have 2,800 damage potential per shell, Atago and Mogami (203) have 3,300, Mogami (155) has 2600, Cleveland and Chapayev have 2,200 and Kagero has 2,150. Due to getting this combination of lackluster RoF, low amount of guns and unreliable or low damage shells, it can very much happen that you are stuck with basically the lowest effective dpm at T8 among tech line cruisers when playing Hipper, or lowest overall in Prinz Eugen. CAs in this game generally have lower dpm than CLs, but Hipper takes it to new extremes by also having low fire chance at 11% per shell. Cleveland has 12%. Kagero has 9% (and due to higher RoF, Kagero is actually about as good a fire starter as Hipper, which is sad). Just to make it even worse, HE dpm-wise, Hipper is actually a downgrade from the Yorck which has barely slower reload, but a significantly better HE shell and 12% fire chance. Prinz Eugen naturally is even worse, due to lower RoF than Hipper.
Now, some may say, this is horrible HE performance is justified by the high AP dpm. But I'd disagree. At anything but broadside, you won't get pens and as soon as a ship angles, you are back to requiring HE to get anything done. Thus, I'm going to say that "AP dpm" might actually be a faulty concept, as frankly, you need someone willing to ignore you "spamming" (is this term even applicable with that RoF?) AP into their side. Baltimore and Edinburgh are slightly more forgiving, as they get improved pen angles and thus can make more generous AP plays, but Hipper cannot. And thus, I find the greatest impact value AP has for a cruiser is the ability to surprise blap an enemy cruiser in 1-2 salvos. And guess what, that's about the only thing Hipper could do best... except it doesn't. Hipper/Eugen seem best in damage potential per single AP salvo, with 47,200 potential damage from 8 AP cits. However, all CLs are more capable of firing a follow-on salvo before the target angled, as can Charles Martel (reload booster!), Baltimore is more forgiving for a follow-up salvo with super-heavy AP (and 45,000 damage potential per salvo) and the Mogami (203) and Atago have barely less AP damage potential per broadside (47,000) but have the accuracy to much more reliably snipe a citadel. Mogami (155) lacks that accuracy but has the actualy highest aP per broadside, at 49,500. Thus, in that role, you basically aren't terrible... but noone else is really worse. And others do have actual HE.
The second point I stated was situational armour. Hipper has 27 mm everywhere, except the waterline belt, where it is more. This allows it to tank 38 cm shells. Hipper and Prinz Eugen have the potential to be up against a full lineup of T6-8 BBs that can be tanked and brawled to death with torps. Too bad MM throws you against T9s and T10s most of the time, where 38 cm is exceedingly rare. Not that at T6 and T7 there are no big guns capable of hurting you and frankly, any non-overmatching BB that is somewhat competent can just load the HE and stay outside torp range. They'll outlast you easily. Fuso has better HE dpm than Hipper. So, you basically can go try brawl people who have no idea how to deal with your armour and mostly BBs. Against cruisers, 27 mm at T8 gets penned by everyone (except those stuck without IFHE for whatever reason) and DDs fall into three categories mostly: DDs without IFHE that can at best pen Edinburgh and maybe Cleveland. They won't pen any other cruiser, because already 25 mm shuts them down. DDs with IFHE, which allows them to pen every T8 cruiser, because 127 mm IFHE can pen up to including 27 mm. And Cossack/Lightning, which are the two T8 BBs with guns you can tank if they have IFHE that others need to be bothered about. Vs DDs, what matters more than Hipper's armour is that Hipper's poor dpm makes Hipper and Eugen the absolute worst DD killers at the tier. DDs like IJN 10 cm DDs can smoke up and farm you for significant amount of hp, or if they have to, all except Harekaze can pick an open water gunfight and win a 1v1, because Akizuki may only have half Hipper's hp pool, but has double the dpm and will torch you far more efficiently.
If you look at other cruisers, they either don't rely on armour to the same degree or they have flat out more useful armour. The latter basically is Atago, which is 25 mm everywhere, except belt and a 41 mm deck. This means that, yes, 38 cm BBs might penetrate where on Hipper they'd bounce, but this armour scheme is actually reliable in what it does from T6 to T10. Shells that land on the deck bounce, regardless of whether it was a Bayern or a Yamato firing at you. This deck plating actually has consistent value. It even holds off most HE. This is what efficient plating looks like. Not 27 mm all over that might as well be nothing as soon as you encounter a West Virginia or Mutsu or almost anything at T9/10.
So, where does that leave Hipper/Eugen in my books? Basically, both ships lack impact. They seem geared most of all to deal with BBs, as smaller ships will frankly take them apart with dpm. Hipper's dpm is basically on par with a Kagero but with 17+ km range and 50 mm HE pen, but for actually removing DDs, this is utterly inadequate (because the range and pen don't matter and Kagero is the least threatening T8 DD a DD can run into, with the exception of Asashio). This means that at T8, Hipper most of all threatens Bismarck/Tirpitz, but Amagi and NC will crap on it just like they do on any other cruiser... well, Charles Martel might speed dodge, Cleveland has a small citadel and Atago can tank it on the deck. 38 cm Monarch and Richelieu might get frustrated by the Hipper, but their extensive 32 mm plating means that a well-positioned Cleveland, Chapayev or Mogami (155) are far more dangerous, as are most other CAs. Against T9/10, the proliferation of 406+ mm guns obviously means that the Hipper basically only gets to shine against heavily armoured ships as quasi-can opener, in the hope that it does more HE damage than others get with fires. But even if Hipper/Prinz Eugen were actually able to kill BBs, that would still leave them with lackluster impact, compared to ships like Atago or Mogami, which can play effective surprise attacks (blasting DDs and cruisers with heavy HE and AP broadsides), stealth torpedo attacks or the ships that have dpm and radar. But as is, Hipper/Prinz Eugen can't even do that.
So, can WG please go and get these ships a proper role and something meaningful to be good at that isn't utterly negated by the majority of ships it runs into? Or am I overlooking something in my analysis?
Also, just to touch upon something that might impact these ships too: WG stated in their latest Waterline video that CAs will receive armour amidships to tank BBs and will no longer get easily penned by CLs. While I have no clue how they plan to do this, it would obviously mean Hipper/Eugen might get buffed. The question however is, if basically all CAs get this, what is the point of these two? If a Charles Martel or Mogami (which after all is a CA hull) can tank BBs, what's the point of Hipper/Eugen?