I just immediately assumed the worst, as I tend to do these days, that you could select multiple perks. Never considered that you might be limited to just one either. Guess maybe I shouldn't be so quick to call shenanigans.
By the way, Bad Company choppers controlled like jumbled garbage. If you think the BF2 choppers are slow and clumsy...oh boy. I sincerely hope they've reworked that stuff. I was never a good BF2 pilot, but I thought they felt good to fly and I could grasp what I needed to do to fly somewhat proficiently. Bad Company is like flying a floating elevator.