I haven't played RCR for ages... but the idea of a 3d one is great
Firstly, I have to say your ramps are pretty boring, some purpley hue shifting in the skin tones would look great.
The animations are all pretty smooth and feasible. Only problems i have are, In the elbows he doesn't put much effort in, generally you put more swing into your torso, like in the double elbow's second swing, but for a double elbow your second would more likely be pointed upwards so your other arm isn't in your way, and you don't have to build up more momentum.
Most of the rest lack power, this would be due to them not following through, when you kick or punch you put your weight behind it (this applies more to heavy hits) which leads to your torso pointing in the direction of the hit.
The hit animation would be annoying in-game, spinning twice before hitting the ground would suck. And in the running/walking animations the complete lack of upper body movement bothers me, I know its an RCR thing but just a little would go a long way.