I'll toss one out there.
I've played MP about 1.5-2hrs. I can say there are some things that remind me of MoH mixed with destruction. Also, some of the buildings remind me of CoD. Sort of a wild mixture of these games.
Recoil is often crazy depending on gun model. Some are uncontrollable IMO. Hit detection seems hit and miss, but mostly hit. The maps 'seem' smaller than BC2, but they say they are bigger. The scope is definitely bigger. Just the overall view and how the horizon just goes on and on. Beautiful and bland at the same time. The uniforms are great. The 3D dorito icon is strange getting used to. No more just aiming under the triangle. It also goes away quickly if the person ducks behind cover.
The sound is amazing. No more needs said about that.
The glitches seems to be mostly fixed. I haven't fallen through the map or seen under it in killcams. I haven't the chance to knife yet, but it will present itself I'm sure. There is somm lag kills though, like if you run through a field and get shot at, you take cover, and still getting shot by a guy clear on the other side of the wall. Don't know what to do about that.
IMHO, they've screwed up vehicle controls. Layouts don't offer BC1 options, so I'm not good at piloting anything. Tanks are beasts, but this is where I'm reminded a bit of Home Front. They do not appear as menacing from the outside as in BC2. They do roar though.
There is even a tank that floats as though its a boat. That's a neat addition. Free falling from off an aircraft carrier or a very high cliff is very cool, but lacks the Assassins Creed thrill. Still a cool thing.
Hope this helps!