Animations of throwing magic in Oblivion and Morrowind were dull and boring. One thing should be implemented: when you're playing as mage, you should have that feel of unnatural superiority and awesomeness. I was thinking it should be something some of us have seen in Dark Messiah of Might and Magic. Also, graphic effects of fire, snow etc. should be more graphically superior.
http://guides.gamepressure.com/darkmessiahofmightandmagic/gfx/word/1814624125.jpg
As for combat, I was thinking of system which was shown in Assassins Creed (but NOT with such easiness) with elements of Dark Messiah (ability to decapitualte enemy).
What do you think?