I would love that it becomes a skill of it's own since unarmed combat is my favorite.
Still, if a whole skill is too much to ask, I at least hope that they will make unarmed count as one-handed weapon and, in case it doesn't, make Elemental Fury work on unarmed.
I would also like to see Unarmored make a return as a skill and that it haves some Athletics/Acrobatics-like perks.
Here is an idea how Unarmored perks could look like:
- Stoneskin - 5 ranks (Req: 0/20/40/60/80 Unarmored) - Gives 10/20/30/40/50 AR.
- Steelskin - 1 rank (Req: 30 Unarmored, Stoneskin) - provides 50% additional AR if fully unarmored.
- Athlete - 1 rank (Req: 50 Unarmored, Steelskin) - Movement speed increased by 50% if fully unarmored.
- Vitality - 2 ranks (Req: 70/90 Unarmored, Athlete) (Req: - Increased HP & SP regeneration by 25/50%.
- Acrobat - 1 rank (Req: 50 Unarmored, Steelskin) - Jump improved by 50% if fully unarmored.
- Cat Feet - 2 ranks (Req: 70/90 Unarmored, Acrobat) - Fall damage reduced by 25/50%.
- Waterlike - 1 rank (Req: 100 Unarmored, Athlete or Acrobat) - 10% chance to avoid melee and range damage.
This would be an extra skill for Thief branch.
Still, I think that in this case Unarmed can get a skill of it's own as a skill in Warrior branch.
I have no idea what could be an extra skill for Mage branch though.
Maybe they can overhaul magic and return Mysticsm (that would be nice).
Ether that or give an additional skill called Spellcraft (basically it would allow you to make custom spells like you could in previous games, but it would be a skill instead of service).
Also, they should make some clothes which can be used by monk-like characters.
I think that this, together with HC mode (http://www.gamesas.com/index.php?/topic/1301869-hc-mode/page__p__19597491__fromsearch__1#entry19597491 my thread on it) and improved vampires and lycanthropes (http://www.gamesas.com/index.php?/topic/1301861-vampirism-lycanthropy/page__p__19597285__fromsearch__1#entry19597285 my thread on them), would make a wonderful DLC! ^_^
Also, if they make underwater world richer wouldn't hurt (http://www.gamesas.com/index.php?/topic/1301899-aquatic-life-is-bad/page__p__19597640__fromsearch__1#entry19597640).

Now those would be some thing which would improve Skyrim greatly!