Camping isn't really an issue in Deadlock. Most heroes have some method of flushing people out of cover, damage fall off is a big deal, and even heroes who don't have tools built into their kit can buy items to flush people out (Alchemist Fire, Kinetic Dash, Warp Stone, etc.)
This doesn't really fill a niche that needs to be filled in the current Item pool.
That said, it isn't a bad ability concept for a hero, increasing/decreasing movement speed in a given direction in a given field.