Nah - it was OK in Denver when they left, that wx is what they were headed into when they were landing.
They diverted down to the south to skirt one batch of wx, waited a while, then came into KC on the backside of that line of t-storms. And those were some heavy storms, too.
Looks like they held for quite a while over the Emporia VOR, then again halfway between EMP and MCI. I don't know what's there, some fix, JHAWK maybe?