So if they (whoever they might be) produced a Greyhawk that really played up these elements, made the setting into the Magi-Tech/Science Fantasy setting these examples imply... how much would serious Greyhawk fans really like that? Honest question here.
So, here's the thing that I keep emphasizing. There will always be a small portion of people that will be unhappy no matter what you do. It's almost like ... they'd rather be that way. WoTC could literally re-print the 1983 boxed set, have all their designers promise to say, "What would Gary do?" before writing every sentence, and send all their product through a English - Gygaxian Verbiage translator ... and there would be those who insist that this is somehow still not true to the original vision. You just can't make everyone happy.
For that reason, the three top priorities have to be as follows (in order of importance):
1. Make a good product.
2. Make something appealing to new fans (because without new fans, Greyhawk will end up dying anyway).
3. Make something that continues to appeal to almost all old Greyhawk fans.
Ideally, you hit all three. The thing is ... if you hit 1, you're going to hit 3! I think we can look at ST: SNW as an illustrative example. It's only been five episodes, and it can still go south, but I'd say that even though it's playing fast and loose with some of the old "canon," older fans of Star Trek are forgiving because it's a
good show that captures the essence of Trek. People forgive a lot when the product is good.
In the end, most fans of Greyhawk just want something good, and they want the DMs Guild open to new Greyhawk material.
If they get that, the only other thing they are going to want is a few Easter eggs or some fan service so they can write multiple long posts on ENWorld about the obscure antecedents of the reference in The Strategic Review.
Um, hypothetically.