Indeed they suffered...
My only hope lies in an incoming buff when the Hobbit arrives. At least, some cheap heroes from Thorin's warband to put more models on the game board
I used to abuse Iron Guards because of their two attacks combined with common dwarven warriors with shield (but perhaps are a bit expensive with that stats compared e.g. to a Feral Uruk overall). The banners are too expensive (in my opinion) and the dwarves need some kind of support against great troops as the Reavers or other war gems wandering in there.
I don't like the Vault Warden team. I used to bounce them in battle until they die without great success.
The Khazad guards are my favourite, but as fritskuhntm said, they need some spears (I used that way before warband rules). I'm not sure about Floi. He has just one might point and his rule depends too much on which opponent you face. And you are not going to recharge will as easy as it could seem. The Shieldbearer I think it is more appropiate in bigger army lists with a monster hero like Durin or Dain (anyway, they are not one of my favourites).
Perhaps the Dwarf Captains could be one of the best hero options in the dwarven army.
Sorry, but I'm trying to find my way with the dwarves too with the new rules. I hope you'll find interesting my points of view.