They took the shittiest parts of MW2 (small-scaled battles, killstreaks that encourage camping) and BC2 (Bloom everywhere, just a couple of different loadouts possible per class) and combined them.
What you'll end up with is a game of camping worse than in MW2. You can't see the camper due to the fucking bloom combined with fog/mist/whatever, weapons are really accurate, it takes a second of fire for you to die, and the camper will rack up killstreaks to use on your spawn.
And I'm pretty sure this won't be fixed in the retail version, since the release is really soon. These beta's of DICE games are just demo's that can be played temporary, with an excuse for bugs and w/e since it's still a beta. Remember how DICE didn't change much after the beta of BC2 was over? Ffs, kits didn't even save nor did the server browser worked probably at day one...
/rant