Nice drakkheim. I agree. Art is fine by me, however, with so many art assets going, I would probably wait and pick the cover art till towards the end of the development cycle. That way you can pick from a large assortment of ingame battles, scenes, images from ingame as well as exploratory artwork concepts from your book and game. I think you would then have a better understanding of what the game artwork should be.
Also, the box art is important for sales and it does influence people in whether they might stop to read it or just walk on by. I think this mostly applies to instore shopping vs online digital distribution, but it probably still even affects digital downloads also to some degree.