Here's a thought:
I'd love to see some older add-ons revisited. Examples like:
1) World of 2001 new VC cockpits! The Work Pod, Discovery, the Moon Bus...
2) The "Aliens" Drop ship cockpit and some more animations.
3) I'd love some genius out there to extend mesh land to create landing bays or platforms with gravity. I'd love to be able to simulate the landing bays on the Star Trek and similar ships.
4) I'd kill to have the arms on work pods and astronauts be able to grab and hold handrails and other surfaces. It would be fantastic to have UMMU be able to have an additional HUD with a "Grab Object" command. Watch that arm reach forward and grab that rail. The animation doesn't need to be perfect, just enough to suggest the experience.
5) I'd really love to have "hard" surfaces. No more drifting through ships and the like. I know some of this has been worked on in the past.
Craig H