Ok so i'll hand it to DICE/EA, they really did end up pulling it all together with the beta for Battlefield 3. I managed to rank up quite a few times playing through metro and while there are still a few bugs and glitches that are present, the dev team has announced The top 10 issues they're working on for release.
Some Jet Gameplay from IGN
First and foremost, they're not patching the beta, and are instead investing time into the actual release version of the game.