It's not a bad idea, but why would that bring them closer to the upstream kernel? UIDs aren't exactly special; are they doing some extra user separation?
Yah, id try to explain but I'll get downvoted for not bring completely correct. It's 'different', there are a bunch of great blog posts on it. Iirc the biggest problem is Google's patches are pretty useless to the rest of the Linux community because the security model is so strange
