Pretty sure when HTC designed this awesome game they wanted to promote WW2 combat.....Think it was Hitech who said he likes to put choke points on a map. Carriers spawn combat when one side starts using it to capture a field.....who knows maybe there isnt another cv for sectors in the area...why not use the Carrier...its down time isnt long at all and its protective ack can be used to defend the field even after its down......there is only 1 reason I can see why this might not make sense, it counts as an airfield.
Make them and the port worth 1 airfield....problem solved
I don't think it'll work that way Junky, the PORT and the CV are separately supplied in the supply chain from the Strats, even though the CV spawns at it's port!
Now, maybe if HT linked the CV's Supply to it's Port, and say if someone porks Ords at the Port, CV gets no bombs, VH is down at Port no GV can spawn from CV, and/or PORT is captured CV is not spawnable for planes or GV's, and you'll only be able to man the guns, but ammo will be restricted to say maybe half, and when ammo runs out, CV will be HIGHLY vulnerable to air attack or another CV attacking it, etc.
That might make for a better solution, to counter those that like to hide CV's, sure go ahead and hide it, but it'll be useless to you if you lose the port, and THAT SHOULD put a premium on PORT/CV defence, in the first place!