You can really see where he got tired of drawing, haha.
He's good on Cyclops, and he likes Wolverine so he does some good work there. Goes over to the other side for a bit, works on Beast, details in the face and hair and goes "eh" about the hand... and then the girls, well, he figured he'd make the most of Armor's armor in that it looks like the Stay-puft Marshmallow Man and doesn't require that much work, and, well, he figured he'd stick Emma there... and then he got to Storm, and eh, he was bored. He was actually bored way before that, but you can really see it there. Yeah, that's enough.