As much as I wouldn't mind more setting splatbooks, my problem here is
- The most-likely candidate for these would be Forgotten Realms, which is the one setting I don't really desire more content from and
- I feel like the setting stuff we've gotten so far hasn't been great. It's definitely improved over time, but I'm not sure more setting stuff will be a strength.
Possibly, though I do think with Twitter Musk has shown himself to want to return to something "before", something that doesn't really exist save in the minds of bitter people who don't like how "woke" things got. If we are actually talking Musk himself, I'd wager we return to stuff that was problematic but "classic".
But really, the whole Musk debate (while a hilarious and wonderfully-unified pile-on on a board that feels like it argues about
everything) is kind of a strawman: the OP wants a "visionary" at the helm of 5E. And it's unfair to try and only associate it with the stupidity of a narcissist like Musk. However, even then I think it's just not a good idea. What we really don't need is a single "visionary" directing 5E, but a group of people making gentler changes for stability and quality.
Right now, 5E is in a pretty solid place sales-wise. Sales are insane, and while I would make the argument that it's so high on the book list because the only place you can properly read the rulebook is physically, they are still clearly making a bunch of cash. 1D&D looks like it has some good ideas for changes (even if they are not likely bringing me back to the game) and overall the whole franchise seems like it is in a really good place for the future. You don't
need a singular visionary who is going out there to break things because nothing is really
broken right now: things seem to be working fairly well on all fronts.
Rather, the biggest threat right now is continuing to dip into nostalgia. I'd rather see a Steering Committee that looks to how past stuff can be adapted and used in a way that won't have WOTC putting its foot in its mouth, as well as trying to keep a nice gap between the top and the most hardcore fans. One of the simplest things they could do with D&D is get a few sensitivity readers/editors to make sure they aren't doing anything bluntly stupid, while also pushing for newer voices and expanded settings beyond just "European High Fantasy". Al Qadim and Kara-Tur are interesting places to visit, but I really don't
trust WOTC to do them with any sort of tasteful handling (I've heard good things about the fan Al-Qadim book on the DMG). They should look at adding new voices to update these places like Paizo did with their Mwangi Expanse book and now their Impossible Lands book, both of which are very good and the former being one of the most highly regarded setting books in my recent memory.
So yeah, I don't think we need someone big to make drastic changes because 5E is not in trouble. I would want to focus on polishing it and making sure it's in a good place for the future, which would be more about doing a better job of modernizing old material and raising new voices into positions of power to help the company from calcifying in the near future.