Some things I would like to see (some may not be possible);

A better response from Firefly to mesh lighting so we don't have to wait a week for  a render that still has blotchy artifacts (in other words, keep developing Firefly and IDL)

A way to group lights to a single control. IDL works best when you have lights that are where the real lights would be. Many models of new houses use multiple downlights. Sure we can duplicate the lights and move them into position, but how much nicer it would be if I could then group them to a single control (even if it was just on and off).

Lights come from mathematical points or from a direction. Can they come from a mathematical line? This would enable normal lighting like neon tubes; just specify the line length.

I am aware that if SM fix point one, points 2 and 3 will also be remedied...

I'm getting used to the hierarchy table, but having it searchable (if you know the name of the object) might be useful, and/or having a selection tool like the one for the material room. I hate having to fish around for the active sweet spot of items (that may be nowhere near the item) to select them. A picker, same as in the material room... click anywhere on the mesh, it is selected and highlighted in the hierarchy menu.

Keep working on memory management. It's getting better, but is still the worst program on my machine. Texture cache for one does NOT empty even after closing the program (although it might when I open it again)... anyway, the program will just stop after a few hours of working on different scenes, just cycling as it tries to load a texture... even a 'clear cache' option when you've closed a scene...

Just a few off the top of my head...