Yeah no, I would not enjoy that. I'm still not pleased with how much expansion space Star Wars land took up at Disneyland, and that's only one land. I get that Marvel or Star Wars could technically encompass an entire park, but you're putting a lot of stock in every potential visitor enjoying that property.
With how much space they were/are giving HTTYD, anything less for pokemon would be a crime against the property.
There are plenty of guest who didn't enjoy potter, but enjoyed the theme park lands. Same with Star Wars, same with anything, really. Arguably though, there would be more to do in a poke-land than in Galaxy's edge or SNW or Potter.
You also just might not be qualified to make that comment based on how well you know the property or not. I grew up with pokemon, I was a kid in the 90's. Everyone had at least a few pokemon cards, we traded our pizza lunches for mewtwo's, our snacks for holo's and first editions, everyone fortunate enough to have a gameboy battled during lunches with the link cable. After it fell out of vogue or kids grew out of it, the nerds and the geeks kept it going all the way through high school and still play the game. I have friends much older than I WAYYYY into pokemon go. Friends with kids have their kids playing pokemon. That being said, I can't remember the last time I paid it any real attention (actually I played pokemon go a bit... That was pretty huge). I played a few of the games on an emulator as a teen, never owned nintendo games really until my younger brother got the wii. I'm not a pokemon or nintendo stan, nowhere near it.
I see what UC pulled off with SNW. Pokemon could easily have features just like that land, and they could build more of it without it being too much. Pokemon is a whole universe with a lot of depth and different areas. You could have a show where you buy your "power up band like device" and get your starter pokemon, just like in the games. Imagine, Cell phone pokedex cases that pair with an app, or even "real" pokedexes. The lines would be nothing like you've ever seen before, even for Olivanders. You could board a Lapras and go from one land to the next, just like with potter. You could have a mine cart ride into caves, intermixed with a dungeon where you catch cave pokemon/fossil pokemon. You can have multiple gyms based on pokemon type, you can have guest battle arenas, you can have shows meet and greets, different areas to catch all of the original 151 built into a device like those "power up bands". Each pokemon can have an animated figure you "catch" like the boss battles in SNW. You could have a bike transportation ride between different areas. To create an activity that is relatively low cost to maintain, that you can only do in one place that takes DAYS to "complete" or is never ending?, It would make money like nothing that came before it.
And then, if they would be willing to take the risk, none of the pokemon lands in any of the parks are the same. Each universal park gets different regions, different pokemon, so you can have an activity that takes place in the real world, that completely resembles the fiction. They could create their own pokemon league with their own game represented in the parks. Their own world pokemon championship. They could incentivize both casual and hardcore fans to go to each of their parks, playing the "real game", They could own their own e-sports league based off their version of the pokemon game, that would be able to be represented with some of the most advanced technology in the world ,because they would be building it to support their parks, and it would serve a dual purpose.
Or they could build a land with a couple of rides that does not innovate the themed entertainment medium, that just checks off the boxes enough to cash in on the property because that's what they've always done.
In my opinion, Anything less than anything remotely resembling the above would be an absolute mistake, because people would pay to live in that land, probably moreso than they would to live on a certain starcruiser... People would pay to go there and be immersed, and anything approaching the scale I am envisioning should easily do gangbusters and dance around anything Disney attempted with galaxies edge, what they did with potter, and would be the next step to raise the bar in themed entertainment design beyond SNW. Pokemon as far as I'm concerned is the cutesy anime version of Star Wars. It has a steady, ever-green fanbase and is an ever green property, and an ever green concept, more so than even potter.
Universal should take the same approach they are doing with potter, but mix in the design philosophy and the lessons they are learning from SNW into a Pokemon world. I don't understand the argument that building a place to go and "actually" be a pokemon trainer would be too much. It's truly the only thing I can think of where they wouldn't be able to build expansions fast enough, and this is coming from someone who is absolutely not invested in pokemon at all beyond fond childhood memories.
I'd love to develop a concept and take my pitch to someone.