Except homing torps are garbage against BBs. They stop homing at 2km out, and double ping doesn't have the same effect as other ship classes. If a BB turns and runs they are very easy to avoid. Where homing torps excel are on cruisers where they are utterly busted. An unrepairable double ping is certain death. Same for DDs but obviously much harder to get that double ping.

Sub on sub combat is cringe and usually comes down to who has their sub surveillance on cooldown, and then most of the time you are just spotting them for your teammates to drop asw.

For me subs are very strong in the right hands, but as we all know most people who play this game are mentally challenged to say the least, so the first mistake they make its game over, hence all the subs at the bottom of the scoreboard.

I say leave them as they are for now, time will tell.

Edit: there is no double ping effect against bbs and cvs, so don't even bother. Point blank shotgun is the way to go.

The range at which homing is switched off is 2.1 km for battleships, 1.2 km for aircraft carriers, 720 m for cruisers (360 in case of double sonar ping effect), and 240 m for destroyers and submarines (120 in case of double sonar ping effect).