Ok how about this:
CV damage to sink = 12k of bombs.
first 2k damage, fuel goes to 50%
6k damage, fuel to 25%, no ordenance.
8k damage CV loses speed, cannot launch any fighters
10k damage begins to list, stops repairing.
12k glug glug glug.
TORPEDOES: Up the damage a torpedo does (for gameplay reasons). Make each torpedo do 4k of damage. That way 3 torps would sink the cv.
Change the AAA of the fleet to be 20mm's, not the insta-kill 150mm howitzers. Make the flak be MANNED only. AI flak rarely kills..and if it kills, it kills 500mph things (grr).
Add "Zig Zag" option for fleet command. It will help evade.
Increase fleet dot bar range to 25 miles. (but no dot dar for planes below 500ft).
THEN the fleets would indeed be balanced. Both attackers and defenders would have an equal chance at a fair fight, not the current "kill cv at any cost or it will launch the endless horde of smurfs and meatballs until our field falls" dogma.