Origami King looks interesting. The generic character designs like the enemies and Toads is still an issue (seriously I don't why the franchise insists on not having any stand-out individuals in a given species), but the rest of the game looks fine. I like the Color Splash artstyle, partners seem to return, and the battle system seems better.
However, something that bugs me with this series as of late is how the devs seem to be way too fascinated by the fact that these games look like paper, and thus can only think of story ideas and gameplay mechanics that relate to paper. The original three games told interesting stories, and the paper aspect was mostly for aesthetics. Now the games are basically "what kind of things are paper related? Stickers? That's the game!" Colors? That's the game! Origami? That's the game!"
So anyways, yeah, that's what I think so far. Game seems interesting, some things I'm not a fan of but I'll stay cautiously optimistic.