If RL is starting to target the developer community, here are some wishlist items.
Global Material:  Soooo many separate materials and meshes right now (draw calls) on exported characters.
Level Of Detail LOD/Decimator:  Can we get CC characters with mesh LOD options?
Custom Clothes/Hair:  Very excited about the announcement for the upcoming CC update.
Mixmotion:  Yes you can wrestle the puppet controls to add multiple layers of motion, but it would be nice to have an easier way to mix motions, mask affected body parts, and mix influence with an percent slider that can be animated.   Ideally just an additional motion track or two with blend/mask/mix options.
Quadruped/Other:  Would be nice to be able to do more than humanoid. 
Perception Neuron/Mocap:  Please keep moving forward with mocap options!