I haven't use my dwarves for a long time, so I'm don't know if or how it's changed with the release of the hobbit. This is mostly because 1) nobody else at my GW plays LotR, and 2) when I used to have games, they were small scale and people kept taking shooty armies that could just run rings around my slow dwarves with shooting them to death (except on those amusing occasions that I used my siege ballista).
To be honest, most of my games ended in one of two ways. Either my dwarves would be shot to pieces, or I would wind up with 3-5 dwarf heroes utterly surrounded in melee, at which point it became an excercise in rolling dice. I'm going to point out that old rules Balin with Durin's axe and Dain Ironfoot were fantastic at destroying entire armies in this way. What's that quote? "We're outnumbered, and surround by enemies on every side. Excellent, we've got them right where we want them!"