What he said...
I agree that the UI is important, but only in terms of functionality. This has always been a top priority for me and continues to be but there is no time for a rewrite from scratch. I recently did a pretty major overhaul of the command editor, adding new functionality and changing all the icons. I don't plan to do that again soon.
The style does not matter and an overhaul of "the look" would be a lot of work for nothing IMO. I am certainly not in need of a make-work project. I have a zillion new things I want to do and a zillion old things that could be improved.