I agree with sarcasm on some points, his legs went down a little in size (or maybe he got every else too big?) but the improvements on his back where incredible...the one year off thing preparing just for the O for sure paid off...
Just some good criticism i think, one of the best features of Jay i think was always the abs (the shape and the flat stomach). While his abs are still very good and years ahead of Ronnie, his waist got a little bigger, and his stomack (while defined) are not so flat as before....
I think he should get back to before on this part (like his 2001 and 2003 forms for instance) while maintaining the rest, if thats possible...
He´s not the king of aesthetics, but his wide-as-a-house shoulders give a good V frame to his body still, and he dont have (if have) any big flaw in his physique. Its easy to see that people only tell that his back is 'weak' when comparing to THE best back actually (of the actual Mr. O).
And besides this, while he has a completely great physique, he also has stand-out parts(legs, calves, shoulders), wich put him in advantage with guys like Cormier (wich dont have any stand-out parts...)