I'd definitely like more maps to be added, but I'm personally fine without there being air vehicles. It was usually an unfun slaughter in past versions when they were present (it wasn't much fun being the one doing the slaughtering after a while either, at least that's how I felt). I think that creating a casual mode of Conquest, like Dice have said they're considering, or Escalations would be better for air vehicles, since they're in those modes already.
As for modes like Redacted, much of the match is spent running around searching for someone to shoot, only to be quickly eliminated by very strong players. One possible solution could be adding one hundred to one hundred and fifty bots and reducing the number of real players, so that from the very first minute there is active gameplay, and only toward the end of the match players face real opponents.
It's not quite what you're asking for above, but there is a version of Redsec in the "Training Grounds" section of the menu that has bots. The map is a bit smaller and there's a lesser player count overall, but it's not too bad.
