>Third versions always have killer post-games so USUM will have one too
So did remakes before ORAS. Gamefreak have made it clear they don't care anymore. The majority of your post-game is online now, they've made it clear the only ingame post-game they're willing to add is very easy to make random portals that spawn a legend. The kids won't bother with a large post-game. They want to play "muh mobile games" apparently, or at least thats what they think.