Let's Go will be back, mark my words. Let's Go was the best Pokémon game in years anyways. Just because you didn't like it doesn't mean it's not a valid and fun game. You're being just as dismissive as the "genwunners" you fight against, but then again so are most Pokémon fans that hate on Gen 1 because it's the hip and cool thing to do
I have a whole 10 point checklist of things that if the next Let's Go didn't do, I'd be interested in it.
1. Keeping to the Grid Layout.
2. Only having pokemon from that region and no others (Even in Postgame)
3. No option to play with traditional capture mechanics with wild battles.
4. Simplification of Difficulty with no challenge at all, along with a partner pokemon that can sweep the entire game for you.
5. Gym Requirement Gating
6. AVs
7. Master Trainers as the post-game content.
8. Hideous Chibi Artstyle.
9. Horrible Online Features
10. Forced Motion Controls and no Pro Controller Support
If they can avoid all those points of problems. I would probably be interested in picking it up. I could probably add respecting that Fire Red and Leaf Green existed as well to that list to be honest.
I would have picked it up had they mixed up the world design and pokemon in it. ORAS actually updated teams with newer pokemon like giving Wally a Gallade now instead of a Gardevoir, that was a cool choice. Let's Go didn't have any of that.
If I have to deal with a Let's Go Johto that won't allow me to use Togekiss, Sylveon, Gliscor, Yanmega or Weavile (among others) just because they didn't exist when Gold/Silver/Crystal did, then it's not a game I want to support. HG/SS allowed them fine. I'll just replay HG/SS instead since they are in that one. Likewise I'll just replay FR/LG if I want a Kanto based game.
And as a pro for SwSh, they avoided... most of the problems Let's Go had. Did fail the only pokemon from the region (Sorta, there's a few more to come looking at the datamine I guess) failed the Difficulty Check (Unless the game really ramps up the difficulty for the final battles of the story, I'll make final call on this when beating the game), and debateably weak post-game (Haven't reached it yet but mixed responses on this) and bad online features with the loss of GTS being a big negative.