I hate to say it, I genuinely do, but I actually do see where Chapek is coming from as well. When the average person goes to Disney World, they expect to see characters that they are familiar with or have grown up with. Think about how popular meet and greets are. Ofc I'd love to see more attractions and shows with original storylines and concepts, but I have come to accept that IP will be a huge part of the parks from now on (or at least during this Chapek era).
IP also doesn't eliminate the chances for classic attractions or shows. Think Happily Ever After. A show full of current IP but one I would consider a modern-day Disney parks classic. I've always said before that it to me is like the Illuminations of Magic Kingdom (sorry Wishes!).
And there's always the possibility of original concepts being mixed in with IP. If balanced correctly it could turn out well. That's why I am curious about how this new show will turn out
I have nothing against characters in the parks, even in EPCOT. They need to be done correctly though. That's always been the argument.
To your point however, I'm not sure people were complaining at guest services that The Three Caballeros weren't in the Mexico Pavilion or that Ratatouille wasn't in France. They may be complaining that Coco isn't in the Mexico Pavilion. (As a point of note, I have no issue with Ratatouille in France).
Historically, Disney thrived by often giving guests things that they didn't know they wanted. Yes, there were familiar faces but there were also things unique to the parks that also made people smile. Even if it's a 70/30 split, there needs to be room for original attractions.