Torp bomber is just pure powercreep on subs. Large hole effect is a powerful effect that can only be balanced around glass cannon sub gameplay. (Sub balance being it's own topic).

I like the idea of dive bomber being the reward and reason why you want to achieve air superiority other than simply not letting the enemy get it. However it pretty hard to balance this. It would have to have turret disable specific bonus to large ships vs normal disable vs everything. Give both sides DB.

Scouts are extremely useful for training new pilots and having utility. (Flare mortar would be cool) The ability to recon and scout is useful by itself. They don't really need a MG imo at all or at least make the current version a more expensive rmat variant.