Personally I'd just as soon never hear of Xindi, Tandarans and Suliban again, but I felt the same about the Temporal Cold War and Christopher aced that one. I'm sure he would do the same with the Xindi and Co. should the need arise. Just because I disliked them on TV doesn't mean they couldn't be interesting if used well...
I see this in my head.
Xindi: Wow! This Federation is like what we had on our own world. Can we join?