CV respawn should be tied to resources. No port should be able to spawn a CV unless it has 100% of all resources for 10 minutes.
AH needs supply lines and depleatable resources. A capital ship should be a major investment and not just something that magically appears off the coast in 10 minutes.
I would like to see the ports redesigned to look more like a ship-yard, where new ships could be seen under construction. The yard resources would directly effect the build rate of the ships.
As ships were completed, they would be launched to sea and wait in port until an entire task group was ready to sail.
Ships at port could have live guns for defense, yet they could still be sunk while at anchor, forcing the yard to build again.