The biggest problem I have with the game is the crummy maps. Most of them are WAY too big. I miss maps like: Arica Harbor, White Pass, Laguna Presa, and Oasis. Both Heavy Metal and Harvest Day were BY FAR my two most unfavorite maps, and those are the most reminiscent of BF3 maps. I mean, really DICE? Even the Back to Karkand expansion kinda sucks. I'm glad we got new weapons and such, but the maps aren't even fun. Why can't we have more maps like the good old days? Heck, I'd love to see more maps like Operation Metro on conquest, aka indoor tight action (with less choke points of course). And it seems like vehicles are the main thing in BF3. A lot of maps on BC2, you get a IFV at best; so it keeps a lot of the action on foot. That I liked. But I'd go to say, in a general sense, the gameplay of BC2 was superior. And the maps were downright heads-and-shoulders above BF3 maps.
One of my favorite kits on BC2 (I played it a lot, was a level 50 of course) was the M50 spec / red dot / magnum ammo. My first platinum was the N2000 / slugs / magnum ammo. Both gave me one shot kills at close range when hit in the torso. Slugs on BF3 are about the most worthless excuse for a weapon I've ever seen. 2-3 point blank, 5-6 at long range? Really? Bolt action snipers unfortunately take 2 hits at close range as well, even though *technically speaking* its shooting a bullet capable of piercing through tank armor. Dunno, I guess I can complain all day about everything they did wrong, or everything that is unbalanced; but I guess that doesn't put forth any good. I still have enjoyed the game nonetheless, I just wish it could be more like BC2.
I will admit, I've *tested* the USAS with frag before. It was pretty fun sniping snipers with a shotgun that had a scope on it...
Some of my favorite moments in that game involved shooting a guided missile from a jet at a jeep with C4 all over it. Massive explosion that echos across the map. Love it!
Will admit, LOVED C4 in BC2, not really a fan in BF3. I think I have like 400 kills with it in BC2, and like 5 in BF3.