To stop spawn camping, you simply cannot "enlarge" the spawn area, instead of one person camping it takes two to shut down a spawn, a decent tanker can accurately hit above 2k away. What I've always suggested was maximum the spawn buttons on the clipboard.
Instead of having one spawn (North) into a base, use all three, three spawns could either tie up a dozen ground units, or have one mission punch through a camp zone and onto a base.
Enlarging a spawn only ties up two campers, one for each corner, with a Panther they could hold the spawn unless supplies run out, having mobile spawns is out of the question since its been brought up time and time again with no interest.
In my opinion, I know of maybe 10-12 tankers that excel in Aces high, given the number that play the game I don't see enough interest in changing anything.
Most have no credibility or simply tank "once or twice" and whine about it (insert reason here), unless the entire ground vehicle system gets overhauled, I don't see anyone taking anymore interest in tanking then we have now.