I'm missing something here, I think. Are you saying grogs don't (generally) want new settings? And if not, what are you saying?
How are you defining want? Yeah, I have generally not seen self-identified Grognards advocate for WoTC to make new ideas. Maybe some have said "they should make something new" but that's vague and unhelpful really. And, I specify WoTC making it, because many of them HAVE created their own settings which they have run for decades.
For my part, I suppose I'm a grognard and yet I'd have no problem with WotC bringing back Nentir Vale as a setting and-or points of light as a setting concept. Or Glorantha, but they might have a hard time getting their mitts on it as someone else owns the copyright; ditto Golarion, which also has quite a bit going for it as a generic setting.
This may seem like splitting hairs, but it isn't. You would have no problem with it =/= you are advocating for something else. You are essentially apathetic to the idea. Expressing a "well, I wouldn't hate it if they decided to do it" isn't advocating for something.
Highly-specialized settings such as your ideas of cutesy animals in a forest or Miyazaki-inspired are only going to appeal to a niche within whichever part of the gaming population you look at, be it the grog subset or the "brand-new-to-it" subset or the greater gaming community as a whole.
Highly Specialized is a very odd phrase here. Dark Sun and Birthright are also highly specialized settings. Yet out of those four ideas, only two of them have been published, one of which is affiliated with modern DnD and getting a new expansion book here soon. So, really, if we were going to set Dark Sun, Birthright, Humblewood, and Wandering Tavern next to each other and gauge their market success over the last 5 to 10 years.... Humblewood is killing it.
And Wandering Tavern is also interesting, because in looking for the title of that again... I also found The Mystery of Yokai Vale, Obojima: Tales from the Tall Grass, and Eyes Unclouded. All of these are DnD products made with inspiration by Miyazaki from different creators. So, yes, it is a specialized concept, it isn't generic, but it is a concept that speaks deeply to a lot of people, because we have a half dozen options currently being sold for it.