Ok I have 2 Ideas for fixing CAS. One Easy one Hard.
Easy idea: just change out the ammo conversion with the ammo drop from the other commander. This way they have to us some manpower(Ost main weakness), and have to have an ammo point for the full effect. Again this dose no not make the commander unviable, but dose punish the player for spamming the ability, and give the other play an opening.
Hard Idea: this idea i came up with as a way to make AA viable. What you need to do is give AA platforms (M3/sovs, Ostwin/Ost, AA-halftrack for both OKW/USF) a set up ability like the american AA-halftrack, but make it so enemy cant call in airstrikes in that area(good size), while the aa gun is set up. Now i am not talking recon runs, the aa can just shoot at them as normally and recon is not something that should be gotten rid of. Sutcka dive bombs, all staffs, p-47s, and any other airstrike on the other hand should no be sent in. This would achieve 3 things.
1. allows all air strikes to be powerful call ins. i mean if this michanice was implemented i don't see any reason for all air strikes to as good as the old il-2. I would say it would add depth to the game with each side trying to get the other aa down so they could call in the Air Cav.
2. would give all implacement like pak-43, and artillery a place in the meta for at least 2v2+. With the AA covering them, they wouldn't have to free stuka dive bombs. (which is one of the main reason for arty not being viable)
3 it would give aa unit an important role in the game. And, like i said it would had a whole new layer of depth to the game.
Quick & Easy Fixes:
- Stuka diving bomb should be dropped by an airplane
- Dedicated AA platforms like the USSR or USF AA halftracks should be able to shoot down airplanes instantaneously (if two are fielded cuz it might get overpowered)