Personally, I find this game ok. The characters suck, since there aren't really any, just toads for every npc. The story is mildly bland, and the enemies are just Mario characters. But actually playing the game I found fun. The sticker mechanic was neat, the puzzles were fun, and the 3D objects that could turn into stickers was cool. The game however didn't feel that hard, like super paper Mario was, as the puzzles are all super easy. At least in super paper Mario, the puzzles were actually fun. In this game the puzzles kinda suck as they are mostly just find an object and turning it into a paper item, then useit on it. It is different, but kinda blacnd.
All in all, the game is an ok 6.5/10. Definitely not living up to the other games.