Hey there.
I've played as your lovely Erebor faction for more than 10 times so far and there are few bugs i wanted to report;
1-You can Trample Iron Hills warriors front line [spearmen] without any trample revenge damage and a high knock back effect!
2-Fili "Hidden Blade" and Wyrm Slayers final power have the same problem as Dain's "Baruk Khazad" ability, when you use them they often don't work but the icon says you just used that ability!
3-"Counselor of Kings" for balin also doesn't seems to be working!? it has no effect, while in campaign it seems fine!
4-Every experience power grants experience for hero units except for kili! (Tried roac, celeborn, boromir, faramir, imrahil, saruman and the great goblin and they all do the same job)