Hi guys, hope I'm in the right place for this :)
Morrowind had a few neat features as far as differentiating the races was concerned, but unfortunately these were abolished in Oblivion and not really addressed in Skyrim as Bethesda continued to lean toward a more generic fantasy feel.
In particular the crocodile-like swimming animations for the Argonians come to mind, as well as the claw attacks of the Khajiits, which I feel has never really been done justice in any of the games, Morrowind included, but are always pertained to in lore. I enjoyed the realism of not being able to wear boots with the beast races too, due to having the classic dog-leg shape which gave them a much more animalistic vibe.
The way that some of the races are presented in concept art intrigued me as well- much less of the classic fantasy, and something much more akin to the style of Morrowind. The cunning and bulbous-eyed looking Bosmer, the many-nippled Orsimer, gaunt and heavy-lidded Dunmer, and the elongated head of the Breton to name a few.
I've looked around the forums for information on these but as of yet have been unable to find anything.
In conjunction with this, I'd be interested to know if the skills of acrobatics and athletics are to be implemented too- I would love to see what could be done with them, even if they were merged into a single skill. It would very much suit agile races such as the Khajiit and Bosmer. Unarmed too, would be great as a comeback, if it actually could DO anything.
I suppose my question is: Are the individual races to be altered a bit or is the plan to stick with the Skyrim models, anims and attributes already implemented in the game files? Are there any thoughts on new animations and skill trees in particular, ones that would really add to the individuality of characters?
I imagine it wouldn't be too much trouble to turn the animations for the Khajiits into a more deadly swipe, keeping the same hit-boxes, or am I wrong?

Concerning the races - we're
Concerning the races - we're remaking all the faces to stick with their most interesting depictions in lore. I'll be doing concept art for that soon, probably (already made some for Dunmer) ;)
Bodies are not yet considered, but I'd really like to see more changes - the physique of each race should be different, insectoid Dunmer, four nippled Orcs etc.
As for beast races having their own set of animations and body type - that is extremely hard to pull off. I know modders have been working on it and didn't really succeed yet unfortunately. I've been dreaming to see that happen ever since I saw those horrible Oblivion's genetic mistakes, but as of now that's not too likely to happen. Animations are really hard to make, and to make them good enough quality to fit with the mocap animations of other humanoids - that would require an expert.