It is too quiet or that buzzing blizzard sound is just not a good choice for it.
My friends and I were in an ARAM and there were a lot of heroes that had AOE circles in it; Galio, Karthus, Janna and Fiddle. It was very unobvious that he had ulted in all that noise compared to standard fiddle or surprise party fiddle.

It is a bit more subtle both in sound and appearance. I had hoped for some candy canes or something instead of the crows.

I thought you sound guys loved replying about broken sounds?