Also in SH4 the torpedo bombers work great. Except the allied ones but there's a mod out there to fix them.
I'm also trying to work on the AI battleships and giving them the same damage model I use. So far so good. Battles often result in a draw with 1 ship sunk and the other permanently damaged either unable to keep up with flooding or lack of fuel to return to base.
My next goal is to change the way the aircraft attack. Instead of sending one or two you know in reality they'd send a whole flock of bombers at you. I'd like to change it so it isn't as annoying. Fighting off a couple aircraft every hour gets pretty old. Now a entire squadron every 6 hours would be very fun.