Vi R problem

Hi, I am Reixa (main Reixa VI), an otp Vi with over 1m7 mastery points on my accounts.

There is a big problem that have always been here with Vi's R and that, in my opinion really need a fix. Vi's R ingame second part of the description is "while charging, Vi cannot be stopped". Sadly she can be stopped, and worse than this she can be pushed away by any cc abilities, such as syndra's E, Vayne's E, Tristana's R, etc. The ultimate can also not follow the enemy champion if he's in a wall (see video).

I know that it sounds like a small details, but this can be (and have been multiple times for me) gamechanging when you're in a lategame teamfight and you're unable to use your R as a gapcloser. As an example, in the video Tristana ends up living barely alive while Vi would have definitely kill her if she wouldn't have been pushed away.