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I think the bigger issue is that the mainline series has barely evolved since its inception. Modern pokemon games play pretty much identically to the very first games with quality of life improvements. I don't see it being very different from other AAA titles that get ragged on for releasing the same game every year.
Rather than doing something to actually push the gameplay further, there is just a random gimick added each generation, which is promptly forgotten for the next game's gimmick.
As far as Dexit goes, I'm guessing they'll post that they will work hard to push updates for more mons as soon as possible and that will satisfy enough people to return to business as usual.