I like this art very much, but I think that it is a very different style than Dixit, I don't think that it would fit the game.
I disagree slightly with this comment. I can see the superficial similarity of both types of art (and for the record I like both).
I also agree with this comment. The similarities are really not close enough, so I think sticking with the current artist is the best idea.
Also, thanks to the OP, I didn't know about this artist, but I like their stuff, it is kind of primitive and whimsical.