No. Nerf the piss out of blink. Teleporting laggers is like the #1 most annoying thing possible in video games, so why hand out the ability for everybody to use? Not only is it obnoxious because it let's them teleport behind you, but like amhustler says, it makes you invincible. Grenade stuck to your face? No problem, just use blink and it won't kill you. Rocket about to slam into you? Just use blink and you won't take any damage at all. It's not even all that useful as an actual jump, it's just a way to get cheap kills and survive things you shouldn't be able to.