The way people use wsg now is completely different compared to what it was, say, pre-2010 ish. Once people started getting good at wsg casting etc, the meta changed to revolve around it more.
I think if they removed wsg, they would either have to completely change the way FHR works, or at the very minimum, change how the swirl debuff works. That being said, if they remove wsg without changing anything else, people would still find a way to be successful without it. Example, Austin one time 3-0’d me NvT without pressing W once just to prove a point (worst loss of my life, and the idiot used immune to lightning iron golem but w/e fuck you austin).
IBS, desynch, str bug, and other bugs aren’t even close to as important as wsg, and pvp would be fine without them.