The only real thing I don't like about the boxart is the bad shadows.
I'm not talking about the lack of them on certain characters like Daisy (hell, in reality, Daisy can lack a shadow when she's midair, try jumping in a sunset while standing on a box, the shadow will disappear underneath your feet), I'm talking about the shadow rendering effect. The lighting direction isn't on top of the characters, where the box indicates where the shadow is. It's near their faces. The shadow direction should reflect on that and take shape of the character rather than have the typical black circle underneath your characters feet.
But what the hell, at this point, I'm looking at a Mario Party gift horse in the mouth.