Played a little bit last night...aside from the obvious ribbons, didn't notice a huge difference anywhere, except for:
You cannot spawn into tanks/aircraft now, until AFTER everybody loads in. (for conquest, 15 players per team need to have loaded, etc.)
It's annoying, but I didn't really play enough rounds to make up my mind yet. Theoretically it'll make it more 'fair' for people trying to take a vehicle, but if you don't even have a SSD at this point, don't waste our tanks.