I am excited for the game, a lot. But equally worried. They could so easily make it worse and crappy.
On the scale of elder scrolls game this is comparatively tiny issue, but i would be so happy if they perfected AI. I loved Oblivion, but when i was in a house 200meters from any guards, with the door shut, and stabbed a guy in a back, i didn't expect guards to come running in knowing exactly where i was. If they fix that for this new one i will be very happy !
I would also like larger, more life-like cities with lots of stuff to do and buy. Oh yes thats a biggie, lots of stuff to buy and make me unique. In my opinion there is nothing worse to spend 40 or 50 hours in a game and then look and be no different to every other person out there. As unlikely as it is, 50+ variations of armor would be nice. With the ability to then personalize your own slightly.