1. Yes, tacs can only bomb airfields and naval bases.
2. Perhaps the CV as a landing site has already had its capacity used up by other moves you have made?
You’re right. Partial retreats are not allowed. The only exception is in amphibious assaults, where air units and land units that arrived by land may retreat, leaving the amphibious units to fight on alone.
No worries :-D It’s in a bunch of other threads, but here’s the latest Alpha+1. Frankly though I like Alpha+ the best so far. I think it’s the most balanced. Haven’t tried +1 yet though.