Only one thing i want to see: http://www.uesp.net/wiki/Morrowind:Wulf
Defenetly! Wulf for the win
Also: NO Dragon Armor(except a few ARTIFACTS, like the Dragonbone cuirass. They should feel rare and unique).
Better options for playing as the faction leader. And factions that work more like the ones in MW(they just made more sense to me, even if I think that OB is an amazing game).
More material diversity(weight, item health, etc. You MW nuts know what I'm talking about
).
Skill requirements for guild/faction advancement.
More artifacts(weapons, armor, clothes etc. All the good stuff
).
Darker setting as mentioned by Thungrim.
More insight into the Nordic religion(and the orcs since their city is quite close).
A book called "Fables of Old" that only have this message written in it: "This story is so boring that you are unable to read further". Would be a fun reference to the fact that many seem to dislike fable on these forums
(never played fable myself, so I can't jugde the series).