_null_target_

My half a cent would be to make this mode like this: Super-BBs helmed by bots and DDs helmed by players, nothing else. :) On the other hand, if you want to "fix" BBs, I think you would have to make secondary artillery manually aimed. You could totally disable automatic secondary fire, make players work for it, have them aim and fire them! Though, secondary range would need increased for this to work, as manual secondaries being outranged by most DDs would make this feature laughable...

Well, submarines were always in this game: they are just called Destroyers.... "Invisible" ship, which fires torpedoes = submarine. :) The spotting system would have to be reworked for surface ships, and also the reduction of accuracy for gunfire. This way the spotting range of ships could be increased, especially for Destroyers. With the reduced gunfire accuracy, a manoeuvring DD would have high survivability. Check out the: https://en.wikipedia.org/wiki/Battle_off_Samar Japanese cruisers and battleships saw the american destroyers, but they could hardly hit them...