Nobody is asking for a perfect well balanced game, I don't think such an animal exists.
But the effects of their changes often come with wildly unbalanced games (Not all the time), how many time have you heard of "Top" players having long runs of losing games and then blaming the mythical "Potato".
The problem come in part from the "Potatoes" not being able to deal with a large swing in the balance on a game, so they camp, or rush in and die.
I was in a game with 4 destroyers per side, 4 Radar ships on one side (theirs) 2 with 10km and 2 with 12km. They could get in the caps and we couldn't for the first half of the game, guess what side won.
I was in a game with 4 destroyers per side, and 2 CV's per side, their CV's targeted the destroyers out waited the smokes and between the planes (half your health in one strike) and the focus fire you have no chance, all 4 dd's were taken out in the 1st 5 or 6 minutes. The enemy dd's were largely left alone and lasted well into the game.
British Battleships threw the whole "Fire" mechanic out of balance, it started a wave of battleships spamming HE at everyone, cruisers burned down by battleships constantly, but you only hear about the battleships getting torched. The game stabilized a bit, but it is still there. How did WG try to fix this, change the battleship fire zones, reduce the effects of fire, when they could have just addressed the issue they caused and nerfed chance of fire across the board encouraging the use of more AP. (I mean up to 63% chance of fire)
You see what I am talking about.
They didn't account for Radar in the matchmaker (which is broken anyway), if there were 4 why was it not 2 per side.
They didn't account for CV's focusing DD buy out waiting their smokes, they assumed as soon as a DD appeared the CV would use all his strikes, they didn't take into account the CV player that strikes and keeps back the last part purely to spot so the DD can be focus fired.
They didn't account for the wave of BB switching to HE and screwing over all classes, but they only really addressed the issue on BB fire zones and a small nerf to fire damage rate.
Each time they address the issue by changing something else instead of addressing the change they made directly.
In engineering you take stock of the current situation, you make the changes planned, you take stock of the affects, sometimes a further change is required, sometimes you remove the change and go back to the drawing board to redesign it into a form that takes into account the unforeseen issues it caused. But you never just leave it in place and decide this CNC machining centre will work fine if we fix that coffee machine over there.
Have they never heard of root cause analysis?
I welcome a "Slightly unbalanced" game but not the landslides we get from "Hugely unbalanced" games.
Broken MM, Broken Fire Mechanic, Continuing CV issues and other unmentioned issues, surely some of these need to be fixed before compounding the issues with a new class.
With so many issues not addressed I find it hard to be optimistic for their implementation of submarines, don't get me wrong I like the idea, I just have little faith in WG to do it correctly, they will rush it in and screw up gameplay in way they haven't even thought of yet.
If you continue to put in new things without fixing existing problems you spiral down a road that takes you to a place where there are so many problems you can't see the wood for the trees.
As a side note do you know what the largest cause of losing customers is.. "Customer dissatisfaction"