Regarding CV's, imho the funnest use of CV's is in long bodies of water spanning the entire country landmass, but only a sector or two wide. Such as the map that had the 85 spawn (can't remember the name of that map) and Port 86 at the far east side of the map. I would up the port count along those "long lakes" to 2 or 3. And I like the chain-of-base format that narrows the front, so you get a lot of players fighting on a few fronts, instead of 30 bases to go after at once. And I like the gv-gv-air-gv-gv chains. They were fun fights on Fester.
Also regarding terrain features, the 85 spawn area and the 135-136 gv base areas were epic.