His chest is plenty thick.. you need glasses .. the clavicles are narrow and the ribcage insertions are fairly short but he developed it as much as possible.. looks fine onstage
I guess you forgot the pic from 2012, about 5 weeks out from the Mr. O...everybody was impressed by his thicker chest.
There is always room for improvement. What you are saying is like saying that his arms can't be bigger. Sure his chest can be more developed. Dude is is only about. 240ish-250. He is just hitting his stride.
People were saying the same thing you are saying back in 2007.