I can see that it impacts Wizard spells like Electrocute, Ray of Frost (like Sleet Storm), Disintegrate, and it causes Intensify+Snow Blast to reset. Visually you can see a slight flicker, as the skill animation is interupted when you click Frost Nova (when it's on cooldown). I have no idea if this impacts other skills. It's really subtle to see even on channeling skills, so I can't tell if it impacts non-channeling spells or not (ie if it's relevant to CM/WW wizards).
Has anyone noticed this before? And if so, if there's been a past discussion on this topic? I know it's new for me for me at least. :)