Since CB30, several players mentionned that an ultimate which is particularly hard to avoid (slow, but from a stealthed unit so any good Skye player will hit 3 players) should not kill you in one run.
Grohk old version of his ultimate looks poor in comparison, and it was considered as one of the best ultimates in the game, if not the best.
My personal view on it is that Skye ultimate damage have been typed randomly. It's hard to believe that it's considered as good balance something which have high radius and one shot most of the champions.