I don't give care if it sells like hotcakes, since as proven by titles like ORAS and XY Pokemon fans will blindly buy the lowest quality titles of the main series if it's new and fresh, while ignoring anything of higher quality when it comes to spinoffs (Ex: Pokemon Super MD or Pokken DX) because it's not the main series.

The main concern for longtime fans like myself is the fact that they need to do a better job of bringing back extensive post-games, adding replay value for both single player AND online (nowadays they just focus on the latter) and it seemed with SM, which came after a nice gap year that they actually did manage to do that for the most part, only to wreck it with USUM being a cheap cash-in to send off the 3DS and not something of the quality of prior third versions.

TLDR: People know that Gamefreak rushing games to get them out ASAP always leads into disaster later down the line and stuff gets cut/dumbed down as a result. Pokemon fans just want them to take their time and make an amazing game even if it takes years to do so. That's exactly what made Mario Odyssey a great game and the same can be applied here.