But, Valve literally pick up and implement what Overwatch did and input buffering is not new as well since Rocket League used it for a long time, also partially thanks to Overwatch dev if you watch Psyonix's GDC talk. So yeah, many game dev does innovate through out, and don't credit everything when Valve implement what other did and maybe make other improvement along the way. That's how everyone improve, by learning from each other.