Well in an artistic sense... the color palette is so small, and everything is dark, muddy even. The shoulders on him are MASSIVE. Now, some of the detailing on the plastron is nice... but then the background is kind of a last-minute "Just throw something in" with the Tim Burton tendrils and the geometric symbols and writing... the facial structure just looks like a man with no nose and chubby cheeks and a bum chin.
I do agree that the right arm placement is kind of odd. The length of the arms themselves... he could scratch his knees without leaning over.
You have no idea what the story is about. While I understand that some IDW covers don't usually fit the stories, this... I wouldn't want to pick it up.