How about the Assult Ships? I'm irked that my helicopters can't operate in oceans (to both attack ships and attack ground units), and they would act as the unfufiled ASW role in the mod (destroyers must attack subs head-on, they can't engage at range). The helicopter carriers could also act as a better transport for fast operations (the standard transport is too vunrabule but should carry more units than the Heli Carrier), a way to airdrop infantry (helicopter Insertion) behind/on the coast for better and more realistic anphibious attacks. These Assult Ships would also be able to carry VTOL fighters if you would like, to better represent modern navies (only France, Russia, and the USA have conventional Carriers; the rest of the world has VTOL carriers for jump-jets like Harriers). I think that the addition of these ships would better an already great mod.
About modern fighters, can you atleast give them a collateral damage function (no matter how small) so the CAS role is better achived?
One last thing, how about some hidden-nationality units for harrasing other countries without an actual war?