someone suggested making a scarlet brotherhood monk subclass which falls into the evil is cool trope which I hate for good reason.
thus I return to my question what other than backgrounds does greyhawk have going for it that is player-facing?
as I am the only non-dm here so I am the best you got.
Ok, sure. Let's get back on this, because, frankly, the tangent is a bit weird and I don't think it's terribly productive.
Now, by "player facing", what exactly are you looking for? New classes? Races? Feats? Mechanics? Since I assume "player facing" isn't really setting lore and that sort of thing. Remember, that Greyhawk hasn't actually had any serious development in about 20 years, since before 4e and no real official material since the 90's, so, there isn't a whole lot of mechanics to draw on.
So, here's my quick list:
Narratives - backgrounds that are tied to character level a la Primeval Thule (and other settings as well) that grant various ribbons based on the setting - so, a narrative might grant followers for example.
Domain mechanics - honestly, I think the whole "let's build a castle" thing really could make a home in Greyhawk. Having actual decent set of mechanics for this I think would be a good way to go. Higher level politics between the various states does seem to be a Greyhawk thing.
Whelp, that's about all I've got off the top of my head. Again, though, I think that what sets Greyhawk apart is largely theme and tone much more than mechanics. The hobby is more than big enough to have more than one fairly vanilla setting, so, I'm not seeing the huge need for mechanics.