*shrugs*
For me, while I can't judge Ultra Sun and Moon's post game as I have yet to get to the end of the main story (very close, though...at the Alter of the Sun), I just want a strong post-game afterwards where there is more than just raising mons for competitive. I find joy in that...mainly because I like getting my friends to rage, such as my two Skarmory, Tapu Koko, Umbreon, Sylveon, Tentacruels, Mega-Swampert, Mega Charizards, Biberal, and of course, Noodles (+more), would like to say, it isn't for everyone.
But, for Ultra Sun and Moon itself, it has made improvements in the actual difficulty...like a lot of trials are tough as hell. All the trials starting the second Island are hard and even Hau is tougher. Not to mention that the story, while it is very similar it's improvements are welcome to me. So continue the good stories and make the game hard for veterans, while still being beatable and rewarding.