Hehehehe how about a "CV ownership Openbid"?
Each guy who wants to control a CV pays a perk price. When somebody comes along and 'bids' a higher price, he will lose the control of the CV, but returned the perks he paid.
The more people argue who's gonna drive the CV, the more perks are in the bet!
And the best part is, if an enemy comes along and sinks the CV, he'll collect the bid amount of perks as a prize!

The guy who got the CV sunk, will lose the perks he bid to control!
............................
Seriously, I like oboe's idea.
It demands a penalty for the player for his poor judgement, and we all know there's plenty of those hanging around Task Groups. It's quite interesting to see that some people just can't grasp the idea of 'retreat'. They seem to think the CV travels in one direction or something.
So how about paying perks, a set amount of perks for TG control?
When a player wants to control a TG he will pay 5 fighter + 5 bomber + 5 vehicle perks.
Think about it guys.. the TG, is in someway, a huge perk vehicle complete with automatic defense systems, manual 5" guns, a 9" main gun, portable radar system, and extreme durability. Like all the perk vehicles in the game, it should be used sparingly and wisely.
The 'responsibility' will stay with him for a certain time even if he retires command - say 10 minutes - so he can't just exit the control when he sees bombers approaching.
If somebody with higher ranks comes along, he will lose control of the CV, but be returned the 15 combined perks, and also be free of the responsibility. The new admiral will pay the same 15 combined perks, and immediately assume the 'responsibility'.