personally, I would like to see more race differences. this would include: different lycanthrope forms like were-alligators for argonians, a difference between male and female werewolves and different vampire abilities depending on race. also, I really hope they don't get rid of shouts. they should probably make them a school of magic.
What would you like added?
Well, I would Love to see some Necromancery Perk Chain Instead Of It being Labeled Under Conjuration,
NO ARROW TO THE BLOODY KNEES!
Some More Ties with the Thevies Guild (A Better Deadra Artifact Than a Freaking Lockpick. Mabye a Dagger?)
Travel To Other Colonies/Regions?
Fairies
And if anyone's wondering, yes they fit in lore. There's even an in-game Daggerfall book about them: http://www.uesp.net/wiki/Lore:The_Faerie
I, personally, would love to have different intros for each different race (possibly lump some of the Men starts together). DA: Origins did this, and I thought it was effing fantastic. Also, I REALLY want it to be on the Summerset Isles so we can take down the Thalmor! More weapons (spears, chakrams, faeblades, scythes, throwing stars/knives) would be pretty cool as well!