My likes, loves even, are innumerable at this point, but I'll list a few:
1) Support abilities are appropriately balanced, there is nothing game-breaking that I've noticed so far.
2) Default classes are still strong enough to compete after a nano-suit reboot. This matters because leveling would otherwise be pretty unenjoyable if you were not capable of being competitive post-50; as an addendum I find the scout class to be the best for releveling in my personal experience.
3) Most of the maps are appropriately sized, and I loved the destructible and utilizable environment weapons/vehicles/walls.
Things that are a bit annoying:
1) Getting accused of hacking, getting voted out of a server for no reason, having your entire team get booted with you. Please provide guidance as to how players can report other players for cheating (with fraps evidence).
2) I've noticed a few cheaters so far; some players appear to have a mod that auto-fires when their reticle aligns with a player's hitbox. I've seen another player with a K:D ratio of 18.50 who did not appear on the master list. I'm suspecting the hack allows him to remain undetected.
3) Hydrodam / Hunter; the dreaded double hs. Hydrodam lacks a central funnel/fighting area that is effectively reachable. The map *seems* too big to be an efficient way to level up/utilize most weapons. Hunter suffers from being a mode that lasts much too long, and rewards far too few XP for the amount of time investment it takes. I believe it also counts as a loss.
Really enjoy the game overall. Sorry for offering random thoughts, but everyone else is sounding off about everything under the sun, so I figured I'd offer my input based on actually having played the game a good amount so far in Multiplayer.