Oh god... Legendary Dragons + Deadly Dragons... Oh god...

Yep. The fights would be so [censored] epic, that this http://www.youtube.com/watch?v=fLI3fSgccZU will play as the music when fighting them, just the chorus going "ALDUIN!" instead.
Armored Trolls and Gargoyles getting an actual Armor Rating (40% Physical Damage Reduction as least, with Gargoyles getting 20-30% Magic Resist as well)
Werewolves getting a Favorites menu, allowing them to switch Howls on the fly once they acquire the Totems.
Vampire Lords and Werewolves being able to loot and interact with objects is already out. http://skyrim.nexusmods.com/mods/21631/