Lag your attacks? Like in real life?
I feel like the AI will already do that for you if you put them in the zones. If you keep them in a physical stack'o'doom and move them around, you still choose the attacks and such yourself ala HOI3.
TF1 Attacks with its 4 carriers at 4am by going into the sea province with the enemy fleet with 4 carriers. Planes fly their mission, as they get near the end of their mission, send TF2's 4 carriers worth of planes to hit that sea province with a night attack.
8 Carriers of planes. No penalties.
If you want to get more creative, use 3 TFs, dont engage their sea province, and send them on lagged missions. If you still have start and end times, you should be able to keep up 24 hour bombardment with a tiny overlap with 9 hour missions for 3 TFs full of planes.
Im not seeing the problem here. I do see that doomstacks will be reduced, and thats nice. I am happy.