Watching how the Paper Mario franchise evolved(and devolved), I'll say this: Ever since it has reached rock bottom with Sticker Star, it has been improving with each new installment.Color Splasch was an improvement over Sticker Star, and The Origami King seems to be an improvement over CC.
While it certainly won't reach the heights of the best in the series, Super Paper Mario, it certainly has come a loooooooooong way since Sticker Star.
That plus the Switch effect will make it sell pretty well. I expect it to do betwenn 4 and 5 million units.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1