Anything that expands gameplay without fudging history too much (a hard target, to be sure) is great by me.
Ground vehicles will be a part of any successful online flight sim, and we all might as well get used to it. And why should it be any different? It's floor-to-the-ceiling action all the time, and soon the Navy will be coming.
"But one Ostwind shouldn't kill a base!" Neither should even three Lancasters drop an HQ, though no one seems to have a problem there. Sure, it should take an armored assault to take a field
assuming someone is home and defending! Washington crossed the Delaware and took the Hessian army without a shot
because they were asleep! The point is, if a side doesn't want to or is too overwhelmed to defend a base, a cannon-armed vehicle will certainly close it down. Whether it is one or three makes no difference at all.
Many is the time I have taken one F4U or P47 to a vehicle base, rocketed the ack, strafed the hangar, then returned a few moments later with the C-47. Easy capture, ridiculous methodology from a realism standpoint. Still, it is an acceptable game concession.
And let's not forget another thing; some hours the population of the arena is considerably lower. This means that in order for players to take advantage of some of the strat of the game, lower numbers of units are required to gain the necessary results. Granted, it shouldn't be too low of a number, but where is the line to be drawn?
If it was impossible to kill an Ostwind or Panzer I could see the argument. If you could not tell from the radar there might be vehicles near your base, I might see the argument. Fact is, neither case is true. Before anyone launches from a field the first thing they should do is check the radar. If you see a red bar in your sector, assume a vehicle is nearby. Watch for the ack to be firing off in the distance, at a low angle of incidence.
The truth is, only a very crafty Ostwind or Panzer jock is able to stay off field in the "oh-so-perfect" target range where they can kill buildings undetected. And if they are at that distance, chances are takeoff won't be particularly difficult.