That's the catch 22, isn't it? Once a media property reaches the age it can apply to AARP membership, you end up with strong oppositional forces fighting for the heart of the IP. Star Wars is the perfect example: do something new and fans hate it for not staying true to the original, play the hits and people complain you aren't doing anything new. Change things to modernize it and purists complain, but keep it the same and people complain you are banking on nostalgia and reselling the same thing over and over.
Bring it back to D&D: would a functional reprint of the 1980 Folio remain true to the spirit of Greyhawk? Maybe, but who's it for? Longtime fans who already own it? New fans who weren't born when D&D had downwards AC and Dragonborn were always part of the PHB? (They have been in the PHB for 18 years!) Are we looking to it to be an expansion to the game as it is now or just to validate that circus troop D&D is wrong?
I guess it's a bit moot. Luke is making a Greyhawk book with WotC's blessing. Maybe it will have a "no kenkus, no dwarf wizards and no non-evil drow" warning on the front page. But maybe it doesn't despite Luke being the closest thing to it's creator we have left. We'll see eventually.