Vi's ultimate
I kind of really despise everything about the "move the hell out of the way, I'm going to kill your mid laner and there's nothing you can do about it" ability. I want to straight nerf it, but that's not gonna fly. (Too many "whiner babies") So I've come up with a compromise. Change her ult to where it will knock-up and deal damage to the first target it hits. It could also possibly become a skillshot, sort of like Malphite's ultimate. I think the ability to have it changed to a skillshot would help balance out the fact that it could now be blocked from hitting it's intended target. This way it would become similar to Caitlyn's ult. (lore lore blah blah lore, PROFIT!)
I could sort of understand if an assassin had that sort of ability, but I'm not sure why riot gave it to a tank-fighter. I've seen her too much recently and even with both Sion and Thresh on the same team, there was nothing we could do to stop her from destroying our Midlaner/ADC at any given time.
RECAP: Either make Vi's ult able to be canceled, or Make it a skillshot (escape potential) that ccs and deals the damage to the first target hit.
Oh god people are gonna bring up a winrate I bet. What an original way to argue about balance.......... Aren't you just so clever.