it's far more than just bug fixes and a few new models.
10 completely new playable vehicles, CV9030F, T-72M1, LAV-III, BRDM-2, BTR-80, M901, challenger 2, GTK boxer, fuchs, cougar MRAP
4 new non-playable vehicles, centurion, M109, 2S1, shilka.
new civilian vehicles, 125cc motorbike, truck, and a van.
5 new bridges, all of them destructible.
playable deployable missile launchers, M220A2 TOW, Fagot, Milan, Bill, malyutka.
4 updated vehicles with improved, or added vehicle interiors, leopard 1A5DK, M2A2 bradley, leopard 2A4, M1A1 abrams.
updated vehicle models, BMP-1, BMP-2, leopard 1A5DK.
increased visibility range, up to 18km.
Helicopters now have the ability to drop soldiers.
thats a bit more than "just a few bugfixes" IMO. and i probably forgot a few things.