1 - Better rigging tools closer to biped in max or xsi rigs this could have it's own room for painting weights/influences on separate objects controlled by the same rig(pants on a character) so you are not just winging it.
2 - Merge the vertex room into the assembly room, it makes multi part assemblies possible or at least the ability to tweek verts/edges/polys in the assemble room.
3 - Render Layers output in psd format, this saves so much time in post it's ridiculous.
4 - Improve the render engine speedwise
5 - LSCM unrwrap and 2d paint tools - this could take the place of the storyboard room which is totally useless. The little window to deal with unwrapping large meshes is a PITA.
6 - fruit/flowers for your tree generator - I don't really use it but it would be cool and some people do landscapes allot.
7 - make the ocean primitive a real thing other than a plane with a bump map. Foam, whitecaps, mesh intersections carried through to ripples on the surface or don't call it an "Ocean Primitive"
8 - You guys did great with the hair but how about a symmetry button
It's hard to brush a furry squirrel evenly on both axis(they move around allot
)
I hope the voice of the few is not drowned out be the voice of the many on this one.