The problem I see, one of the hurdles to jump, even after Cyan negotiates for the rights and gets them. Is the worst possible scenario. A return to the UU game engine. That means that the MUOL ages will have to be backported. Which is what Drizzle does. Unfortunately it doesn't backport them completely. The ladders don't work. The footsteps only work on the upper levels in the pods. No sounds. No camera regions. Etc.
So, a lot of work will have to be done making those ages, work in Uru. Which is why getting the import function to work with the converted MUOL ages is important. If they were made differently in 3DSMax, we need to know how, so we can make the necessary corrections in the code of either pyprp, or drizzle, to convert them correctly.
We'd also have to write new scripts for the ages themselves, their puzzles etc. But, hopefully Cyan would help us with all of that.