what i think HTC was doing was making it so the torpedo actually sinks a ship being 2000lb.
I think any ship hit well with a torpedo should go down but with bombs dropped from the air it should be 4000lb or even 6000lb to make the level bombing as hard as it should be.
I think the real answer is less accurate bombing with larger blast radius.
As for the kamakazi bomber how about making heavy G dive bombs on aircraft that didnt dive bomb( eg b17 and lancs) cause bomb hook ups or better still explosions.
so if you crash dive then drop 6 bombs they explode on exit and kill you
