>>58040915 (OP)I dunno, I actually think it might be the opposite.
For a long time Pokemon's been a bit held back by having to juggle the competitive side and the campaign, to the point where the latter started mostly just feeling like a really dragged out tutorial for the former, so segregating the two will allow them to refine and experiment in the single player while still retaining the competitive integrity of the game as its own separate thing entirely.
It might hurt the longevity of the games individually as these huge live service deals with constant updates but I don't think it'll kill the franchise.