I can't describe it either.. but the game felt off to me as well. I played a fair bit of the beta, and I just really wasn't as thrilled with the game as I would've hoped.
Also felt like no matter where I went, it there were enemy vehicles galore. Really felt like it was a vehicle battle more than I'd prefer. --someone in the game said that the vehicle count was purposely LOW in the beta?? Ugh.