The Ugly
I really hate the body. I like the new heads, hands and feats, but simply reusing the Human Frame rubs me the wrong way. It just doesn't look "bestial" enough. I have never totally understood how Keith viewed them in his vision of Eberron, but for me they were stuck at some point between the transformation of human and beast. So I wanted them to mabe be slightly hunched and maybe run using hands and feet.
The Bad
A number of two handed weapons do not mesh with the female avatars, they end up floating about foot from where they are supposed to be. It actually was nauseating to watch the character fight with the weapon so far out of alignment with the frame.
The new heads, hands and feet have a clear line of connection with the Avatars frame. Color, size and occasional space delineate the difference.
I tried to build a big stick build using a shifter. It is not going to pretty to play this build through the lower levels of the game, the feats, enhancements, and other aspects do not align up through roughly level 12. I started to think about other potential builds and i see a lot of builds that have potential to play at the upper levels of the game but are going to be a bear to play at the lower levels of the game. For a race I think this may be an issue, I am not sure how you fix it, or even if you should. I am however worried that Casual players will be very put off over the challenge.
The Good
I really like the new heads, hands and feet created for the race. They all portray that internal beast attempting to escape confines of the body.