Not really. Amazingly enough, I wrote a whole post about it, including a section where I explained where we could go.
But the one thing that usually doesn't work is the people who don't care about Greyhawk at all lecturing the people that do about how it's just a generic setting, and why aren't we just playing Forgotten Realms anyway?
We don't want a setting encased in amber- we just don't want people who don't seem to like or understand the setting (such as you) wrecking it again. I mean, as I went through in the thread, that's already happened plenty of times.
To address your point directly: I actually question how many designers there are
left that the Greyhawk fans would actually trust that WoTC could actually hire. I hate to keep calling out the passage of time but I don't imagine that is a large pool to draw from, particularly from a business standpoint where WoTC only has so many coveted designer spots in their budget and would gain much more from someone who could work for their company for decades more.
To be clear, I do understand Greyhawk and everything that you have said. It is
because I have taken the time to research it that I simply do not like it, but I understand why others enjoy it, as I have similar wishes for Dragonlance to be brought up to a modern audience. But I say to you the same I say to Dragonlance fans whom only want to see the setting rerelease the original trilogy reprinted and the series
never updated after: nostalgia obsession leads to nothing but the death of any hobby or fandom, and it is the other piece of of the puzzle for WHY the settings other than Forgotten Realms are in the state that they are in. It is
not just all the fault of TSR or WotC. And hell, this is coming from one of the biggest critics of Disney Star Wars here.
We have to realize that most of the settings at this point are so dated they basically are all blank slates at this point to the majority of the WoTC audience, and like it or not, if a setting is to continue existing it needs to have a
reason to exist. You claiming "Sword and sorcery" is nice and all, and I understand what you mean because I'm a fantasy junkie, but most of the people who play the game frankly do not know the difference between Sword and Sorcery and High Magic, to them it's all just "let's be elves and dwarves and go fight dragons with flaming swords." I
could seen a solid argument for maybe making Greyhawk the setting for those who prefer a traditional sandbox campaign largely focused on dungeon crawls, but again I hark back to my earlier post: does enough of the modern D&D customer base
care enough to actually make making such a book, especially when the large part of the Greyhawk fans will hate the book anyway? Opening it up to the DMG guild is honestly probably the best call they could make.
Related point: I'd actually like to see the actual metrics on hardcore Greyhawk fans and if they still largely play first or second edition versions of the game compared to 5e to be frank. I'd wager a large sum that most of them don't even play 5e, and it would largely be more profitable to just reprint older modules anyway that are out of print, but I welcome being proven wrong on this point. To the point of updating older modules, I point you to multiple books we've already had: Tales of the Yawning Portal, Curse of Strahd, and Saltmarsh.