I loved the game, yes it is a bit short but the mechanics are great and the battle menu is no where near as bad as I thought it was going to be. The story is solid (acting iffy sometimes) the comedy is good, the lighting is insane. Most importantly the gameplay itself is fun and I actually died (many a times) because this game is not just a walk in the park.
With that said, here are some things I would love to see in orcs and men 2 or an expansion and also my main complaints about the first version:
1. An open world
2. Co-Op... My god I want to play with a friend, me the orc him the goblin or vice versa.
3. a crap load more items and loot.
An expansion would be great if you could use your already leveled up character to continue on with another story. It would be nice also that when you replay the game you would keep the same character, he needs to be persistent so that you don't feel like you are doing it all over again from the ground up.
However I HIGHLY recommend you try this game, it is cheap (compared to all the 60 dollar games out there) and you will enjoy the time you spend playing it.