okay going to go over a quick pros and cons:
pros:
graphics
weapons more powerful
FUN
throw knifes
sniper seems ALOT better
quick loading times
cons:
performance issues, SLI isnt yet working which blows for me, my gtx 460 (running single) gets me around 30-40fps ish with max ress for my monitor and graphics on high (you cant change many graphical settings, alpha eh). which is playable but im expecting to be up and above the 60fps mark come sli working, probs more, it isnt optimized at all.
3d spotting, it was annoying in bc2, its still here now, makes the game unrealistic.
bluring maybe over done in movement, but i think thats more to do with my fps, when my fps is up it looks great.
Right first port of call is the battlefield battlelog website, this is in fact where you start the game from, your browse the servers from browser and not ingame, although I think this is just for alpha (hopes), the site is easy enough to navigate though, so its not to bad.

first screen your welcomed with and there's a lot of stuck locked still, to join a multi player game just hit quick join and it boots it up pretty fast.

browse server list

profile + stand screens


map operation metro is the only map you can play at the moment, its split into 3 sections.. first the park, the subway and then back onto ground level in the city. Issues with this at the moment though, the first section in the park seems to easy for the defending team (maybe my team are just shit) but the amount of times you'll play it and not get past the first stage is a joke, and its a shame as the subway bit is great after...

deployment and kit screens, not many options as alpha!.




this is the park bit to begin with below, there's a lot more plants/trees to hind behind then what was in bc2, and you can really stay hidden. You can now crawl along the ground now to.


new repair tool

vehicles, at the moment just the 'LAV-25' is in, which is handly amphibious, though haven't tried driving it in the water yet.



subway part, love this bit of the map, quite a few bottlenecks to this map some areas are really dark, they have changed the red sight a bit now so sometimes u see a laser aiming around from others which is a nice touch!.




other things to note, there is now NO MEDIC, instead assault carries the difib, which seemed a little odd to me at first, the medic has been replace with support which now carries the ammo instead, and has a far more range of different weapons. Weapons seem more powerful then in bc2, say your 2v1 in close quarters, you now have a real chance of dropping both of them instead of just getting raped like before. You can throw knifes too, haven't managed to kill anyone by throwing one yet though.
I'll post some more updates when I have some.