Official Discussion: Helm's Deep NDA Drop.

[Belnavar]

In BB, your class skills are really not used at all, sorry.

Really? Because I found I couldn't actually kill mobs directly without using my class skills, and couldn't heal allies without using my class skills (though bear in mind that AOE heals did not apply to NPCs). Yes, there are a slew of new skills and ways to play with the siege weapons, commanders (and their respective buffs), and killstreaks, etc., but you can still use your normal character skills just fine.

-Bel