I don't think it makes much sense for only spitfires to require a special unit to use the carriers. I was thinking along the lines of all (or most) carrier aircraft having 'carrier trained' versions. I think a capacity limit for carriers would adequately prevent exploits. I don't know that removing the hurricane is a good idea. It seems like it has to be there in case its services are needed, even though I don't use/need them. For example, they would be best, I think, for attacking carriers and task forces. They might also be necessary if Germany puts effort into Wolfpacks and contesting the Atlantic, though Sunderlands are probably better. I would probably like hurricanes a lot more if they could climb to high altitude. Then, they could be a 'compromise' between the Spitfires and A20s. Maybe they should be given high altitude capability, but only drop bombs at low altitude.