Ugh. I have to say, I am feeling a little disappointed.
I'm really bothered by the fact that Pyukumuku can't attack. I wasn't planning on using one and at least its movepool would perhaps give it a niche in competitive, but as far as single player goes it's practically useless. Why doesn't it have access to some token Water moves or something? I swear even a tank/wall needs something in the way of damage!
And yeah, everything's pretty slow this region too, which is a bit silly and might make it unfair when battling older Pokemon. Again, I'm not competitive, but still...
(Idk if they went too crazy or not with the nerfs, either, since I'm not on the scene)
Things also seem a little too dark for my tastes. I was never really fond of the whole multiverse split in ORAS but at least there it was only implied, so you could just forget about it if you weren't interested. Here it's stated full on that the games are in different universes, that people have been kidnapped and given amnesia from the old games (?!) and that possibly the old universe has gone through an apocalypse? It all feels a bit much; I don't know if there needed to be a universe split in the first place (yeah, some games have been remade, but others haven't, and it's not like the two sets are that different) and the whole thing seems a little confusing and something about it doesn't fit in with Pokemon for me. I don't know what, maybe it just seems too distracting from the actual Pokemon aspect, even if the Ultras were behind it.
Also not fond of the darker Pokedex entries, especially with Megas. Again, wasn't it supposed to be based on friendship, so why is it turning Pokemon into battling machines? It... kinda sucks the fun out of stuff. At least Pokedex entries are easy to ignore...
Sorry for all of the negativity. There are some things I do like. The plot seems pretty good for Pokemon standards from what I've heard (though I'd need to experience things myself to know for sure). I really like Kukui being the Champion. Some of the new Pokemon designs are still very good. I just wanted to get some stuff off my chest, that's all.