Reviews are coming in... https://www.metacritic.com/game/switch/paper-mario-the-origami-king/critic-reviews
I haven't see anyone directly compare to Color Splash, but the reviewer at Ars Technica said in the comments "I didn't like Color Splash or Sticker Star much at all. Origami King is definitely more engaging than those two." He also said it was the "Mario Party of RPGs" due to all the mini-games.
Just one more day...