I saw KC open with Discipline in Orlando, a couple of months back. Levin was there with Fripp. The show was as good as you'd imagine.
I think a lot of the audience only knew their first album; some folks left when it got heavy. As for me, Discipline is one of my favorite albums by any band - followed by Starless.
My (adult) kids really liked that Fripp screwed with us by saying no pics because the band would pose when it was over - which they did not. Ha. Fripp being Fripp.