I still miss the Anti Tank class from DC...
SMAW, Stinger, Mines, Pistol, Knife... all you really needed. I think Keas will attest that was a decent kit in my hands

Though, slightly overpowered since the SMAW was pretty good at Anti-Infantry, if you could aim (though, you only had five rounds). Engy was great as well... Shotgun, Pistol, Medipack, Spanner and Mines from memory.
I'm still not a fan of relying on mobile ammo points, basically. I like knowing where my reloads are.
I still kinda think BF3 could split out the classes a bit more, but it's slightly pointless because of gun choices now. I mean, Spec Ops in DC had a silenced M4, with C4, silenced pistol... bit of zoom. Sniper was more specialised in zoom, and no C4, just nades. At the moment, and my feeling from BF2 was the assault class shouldn't be a medic too.
But I don't like auto resurrect either... don't like just popping up alive at someone elses whim. I'd prefer to choose.