I found the Acadia styling quite pleasing, given its dimensions and other market niche requirements. As best I can analyze this for now, factors include: the body is somewhat rounded rather than being squared-off; the large lips around the wheel openings help reduce the feeling of bulk, as do the character line along the door handles and the shaping at lower-door level; and finally, the grille-headlamp ensemble that is clearly separated from the bumper-air-intake ensemble below it.
Then, for 2013, the Acadia was given a facelift to "freshen" its appearance. As with most facelifts, it was a change for the worse, or so I think. Below are comparison images of the 2007 and 2013 designs. The original design is at the top and the facelift is at the bottom of each image pairing.