Fiora's ult should be changed somewhat

I feel as if Fiora's ult is just a little too powerful, just for the fact that it can't be interrupted, deals pretty good damage, and she gets to follow her initial target.

I'm not entirely sure how this ult should be changed (NOT reworked) to make it so it's a little less...uncounterable. Your choices against it are pretty much don't let her engage on you with it, or build a Zhonya's. Bursting doesn't really work unless you CC her the entire time, because if you try to burst her without CC she'll just ult anyway.

I'm thinking maybe make it so she has a 1 second charge time (not channel) where she can move and attack, so she doesn't get her damage reduced, but make it so you can silence/stun her before she can use it. It wouldn't effect her much 1v1 if you don't have either, but in team fights when it's on such a low CD that you can use it every fight, it sucks to not be able to interrupt it.

TL;DR Fiora's ult SHOULD have some way to counter it. It deals a lot of damage and there's no straight way to counter it.