No, they do not.
Today I got a chance to play against a guy who uses these vials, and they're simply too powerful. They are too fast, and that might need a nerf in itself, but past that, generally speaking, things that speed up your character should NOT exist in a competitive environment, it completely messes up any prediction you could have on where your enemy could be etc.. Map knowledge becomes almost useless.
These vials completely mess with CW play-style and should not be allowed inside it