After playing a bit with subs in game now, the conclusion is the following:
They make tha game a LOT less fun to play. it's even less agressive gameplay now, than in the time of dead eye.
There is literally no counter to a camping sub if you are not sitting in a dd. The idea of releasing mor pushy bb's at the same time, is hilarious, because they are pretty much unplayable as soon as they sit on a flank where there is a submarine. Same goes for non camping heavy cruisers.
It's just not a fun addition to the game.
In general, ships with wich you can't really interact, are bad. The moment you are beeing targeted by a submarine in a bb, if the sub is not completely bad, you can aswell just go away and pick up a cup of coffee, because you cant do a thing to survive. citadell torpedos that cant be dodged from a ship tha you cant see. Really great idea...