Doing closed beta testing for this game. Can't say anything since you get tagged with a NDA. What I can say is keep an eye out for it, they sort out the bugs - which they are working on rather well - it's going to be a cracker. Enough said.
Since it's already been told to the public, I can say there is no set class system. How you play you choose to do, and it's up to your own personal strengths ie tactics etc how you get along. It does actually work though - rather than relying on some fluke through skills applied, if you find out the opposition (real not AI) is heading somewhere and you get there first, whip out a big ol' weapon and ambush them, they're going to feel every shot. Got a lot of potential for tactics etc. Everyone then plays their own way aswell rather than restriction to archetype, that and with the levels of customisation to be had you can completely have your own thing going rather than thousands of clones.