As it is right now in Aces High, there is one GV that isnt, well, to be blunt, a piece of toejam. That is the Ostwind. The Panzer and M8 both seem to be made out of something with the properties of glass, shattering into little pieces when strafed by either Hispanos or .50 caliber machineguns. The M16 is just as frail (as it should be, it was open topped and had no armor, after all), but 4 .50 caliber machineguns just can't compare with the one hit wonder that the Flakpansie is. Both LVTs are useful, to a very limited extent, which I think is a good thing.
I would suggest the following-
1. Make the Panzer invulnerable to anything less than the 23mm mounted on the IL-2. Even though the 30mm on the German planes is a bigger caliber, they were not using AP rounds (to the best of my knowledge), and they should also be ineffective against tanks. Panzers should ONLY be able to be damaged by either the large caliber cannon carried by the 'tankbusting' planes (IL-2, Hurricane 2D, Yak-9T) or by rockets and bombs. Yes, I mean the tracks too. I know that in real life tracks were damaged by strafing. This isn't real life.
2. Do SOMETHING about the M8. It is utterly useless as far as I can tell. A single hit by just about anything from .50 caliber on up will disable all the guns on the vehicle. The 37mm popgun requires at least 4-5 hits on the Ostwind, as far as I can tell. Why was this vehicle introduced again?
3. Perk the Ostwind. It is absolutely absurd how many of these you will see in an average GV attack. Often, you will ONLY see the flakpansies, and nothing else. I think a 2-3 point perk, combined with lowering the ENY value to 5 or so would curb the population a bit.
4. Change the spawning points around a little bit. I personally would like to see 2 layers of 'advanced' spawn points. Obviously you would have the hanger, then one that is close to the enemies 'advanced' spawn point, then one that it YOUR 'advanced' spawn point on the enemy base. I would also randomized the exact spawn location of the vehicles, to perhaps somewhere within a 2km radius or so (placed so that no land GV will start out in the ocean though).
I understand that Aces High is primarily a game about planes. That is absolutely fine by me, in fact, that is almost always where I am. I would just like to see ground vehicles that at least serve some purpose- they DID use up time that would have otherwise been spent on another plane.