Skub is a minor thing.I have no idea what this means
ProSkub and AntiSkub is fans promoting something minor to a major aspect then fighting brutally about it
Greyhawk fans emphasize it's unique elements are the highlights of the setting. However if they overemphasize these elements, they create a Greyhawk far out the range of WOTC's current level of commitment to quality. But if they go too much in the other direction Greyhawk becomes a boring Alt-FR.
My argument is that since 5e doesn't have a setting design specifically for it, a new setting designed specifically for it or a more recent setting offers an option that lacks this delicate balance.