It makes you wonder what it'll take for things to turn the corner. The answer in the 80's seemed to be New Management. I can't imagine the New Management we've just come into is going to usher in an era like The Disney Renaissance in any facet of the company, especially Imagineering.
Let's hope I'm wrong?
It's unlikely IMHO that a Renaissance-like upheaval will occur ever again. Even during the 70s and 80s "dark age", there were still executives and board members who recognized and appreciated Walt Disney and the creative works that came out of that era. This includes Card Walker and (briefly) Ron Miller, but there were also a lot of members of the Disney family (including Roy Jr) still actively involved in the company at the time. There was an internal realization that the films that were being made at that time were a step back from the Walt era. And they had a desire to change that and usher in a return to form, even outdo it if possible. This respect and affection for the Walt era along with an acknowledgement of problems and attempting to fix them was what allowed the Renaissance to occur in the first place.
Can it be said of any current executives or board members that they respect and liked the Walt era and desire to return the company back to that standard of creativity and quality? The answer to me is clearly no. The executives running Disney today are detached suits who only view Disney as a cash cow to be milked dry, gutted and thrown into the trash when it's no longer of any financial worth to them. They've actively demonstrated a complete lack of reverence for the Walt era. If Disney executives today were forced to choose between 1- Walt era standards (heck even 70s or 80s standards), or 2- Allow the company to fail like Sears, Kmart, Toys R Us etc etc, they would likely go for option 2.
Another major problem is an apparent and severe absence of basic competence and artistic talent compared to previous generations of imagineers. While Disney's movie offerings had a lot of flops during the 70s and 80s, the theme parks generally still pumped out a lot of amazing quality. Big Thunder, Fantasyland 1983, EPCOT Center etc etc. EPCOT Center alone helped keep the company afloat and compensated for the film flops of that era before the studio Renaissance.
I would imagine this former competence stemmed from the fact that there were still a lot of Walt era imagineers still at the company in this era. Even Marc Davis, Ward Kimball and possibly others who remained among "Disney's 9 Old Men" were actively involved EPCOT's creation. They were also training the younger generation, so a direct lineage of the Walt era creativity and quality was being preserved. In 2020 however, most if not all of the original Walt era imagineers are either dead or retired. And most of the younger generation they trained are no longer at Disney, having resigned or outright fired during the Eisner and Iger eras.
So even with a massive upheaval of the corporate structure (which will never happen as long as there is no respect for the Walt era and a desire to get back to that standard of quality), it won't be a magic bullet for fixing the problems with the studios or parks. They'll have to gut and rebuild imagineering and many other creative departments from the ground up as well. And so much damage has done to the parks over the past 20-30 years (with no end in sight) that much is likely irreversible even IF amazing executives and creatives were brought in to try and fix it.