In my experience of the Kevlars… they are pretty weak. Got six pinch flats in Penmachno on one ride running the sorts of pressure i would on my normal 'non kevlar' version of the same. The side walls are much thinner than normal rollers.
I used all my patches, and cos it was raining they didn't stick to the inner tube, and i had to walk a fair bit of the way round.
Grip, and tread the same tho'. Just prone to pinching. So, on a tubeless, i reckon the distortion in the wall of the tyre would cause some nasty rolling sensations in the corners.
Mind you… that's where i like to push it hard….
i went back to single ply front, and double ply rear.