Not a bad UQ reintrepetation in my opinion. I do have critique. The whole sounds kind of "busy." The constant eight notes make the rhythm sound a bit stiff. Some notes seem to jump off from the musical scale and that's a bit jarring, especially at 00:05-00:06. I hope you get what I'm talking about.. anyhow, it still sounds like Ur-Quan, but a bit frantic and quite desperate - like they were still trying to pose as powerful, but were just about to lose to the Kohr-Ah.. I think having such a change occur in the music in the game might work.
Damn, those samples sound awful.

Kohr-Ah ambience is a nice bit. I didn't remember the original so I had to listen to it. (content/comm/blackur/blackur.mod right?) The original sounds kinda wierd. Both are more serene than what I'd expect. Which is a spooky effect, I guess. I think the new one feels better to me, staying in a single chord and not having a beat, even if that was sparse in the original.
Had to listen to the Precursor remix as well. Damn these sound clean and sparkly.
--Eino