I thought hitman blood money did a good job with stairs. Your character would automatically go to a slower pace as you walk up stairs and crap....but in skyrim i think it would be different....theyd have to implement that for every damn slope and high angled area not to mention making it look good on every terrain. And considering we're in the mountainous regions of skyrim they would have to do this for almost every single area in the game, seems like it would take too much time. But who knows maybe they have.