I'm sure you know why its implemented kilz, but for those who don't, its meant to encourage folks to switch sides to even out the teams. Now I don't agree with GVs being counted as part of this deal because there just aren't enough of them to limit. However, I don't have a problem with the fact a tiger couldn't be launched. You should still be able to take out panzers and t34s, but a tiger is a perk ride and I think the limiting of such powerful hardware is the whole idea of this venture.
I don't have any problem with the planes being limited either, but everyone should be able to take up an osti, m16, panzer, or m16. Otherwise, your defense against a gv attack is far limited.
I understand your frustration though.