Well I think a hardcoe mode would be great. Optional set of rules that add to the experience for some and can be ignored by others. The gae sold truckloads they ahve the cash to spend time adding more optional features.
Following most poeple's logic there should only be the ability to play generic nord warriors because that is what the majority of players play as.
Playing as a vanpire is not the answer. Vampires svck (herp) and not everyone wants to play as one just to have some added resource managment in game.
Someone above mentioned potions and I 100% agree, a mode of play that made potions require and animation time to drink so you couldn't svck em down while paused and make them work over time would be awesome.
A bump to the cooking system and a requirement for using it in an optional mode of play would be very welcome.
More options, more ways to tailor the rules for different tastes and someway to increase the need to manage resources would make the game more fun for some people.