Patch 5.13 Karma Ult Q not applying slows properly

Started playing on patch 5.13 and one of the things I notice is that a direct hit from an Ult+Q no longer seems to have the same punch. Apparently champions can just walk out of the Ult+Q without taking the second tick of damage. I know that they have made changes to the stacking of the slows but I'm pretty certain that the 50% AOE slow that is supposed to be applied isn't going off on champions that were in the initial blast. Champions who walk into the AOE slow are slowed as normal. This drastically changes Karma's damage output and play style. No reason ever to Ult+Q since they will never take the second tick of damage unless already rooted.

Karma was already a marginal champion that required love to play. Good early game followed by a drop in power after level 6 compared to other champions. Now she has terrible early game followed by terrible end game.