I guess the difference is that with Vrana it was substance abuse and there has been no mention of substance abuse with Kylington, it has been health related.
They had the option to put Rooney on a conditioning stint as well, but he went straight to waivers. Just seems less likely that he would get claimed if they put Kylington on waivers, instead of letting him play in a few conditioning games. Colorado and Washington each have two scouts at the game tonight, I am guessing to watch Kylington.