[Cowboybebop]

First and foremost for me is .ASE Import/export

Animation bone animation with the option to save animation to a separate file like a .skl. Something to were you could use the same animation on different models

Extend lighting - Make the lighting adjustable, add more types light.

Multi Texturing

Modify existing models- To be able to do simply things like bend a pole, quickly.

I disagree with the use of CGfx including that in the base product would make me puke. If shader support is to be added then make it general hlsl First baked in and then add CG as a plug in down the road. If your going to add shaders