OK, we can have a different view on aesthetics which is fine, but symmetry is a mathematical/objective thing. His back was far from symmetrical!
Regarding his proportions, his chest was strongly overpowered by his delts.

Absolutely, bb is entirely subjective... About his back, lots has been said about it, the truth is that he had a wide back with great insertions, his lats from the front were huge like wings... Dillett's problem was poor mind-muscle control (i seriously don't know the cause, bad reaction to some substance maybe?), a huge problem that fucked his posing, especially the ability to open his back, and his training... His shoulder problem didn't help either... Yes, his chest was wide but not super thick, but honestly wasn't such a proportion flaw... Wheeler, the Sultan of Symmetry, had his "aesthetic flaws" also... The very true proportioned aesthetic bbs were usually midgets like Labrada, Benfatto, Ray and similar...
Agree his shoulder to waist ratio was ridiculous, have seen him up close many times! Would like to see those pics!
If someone explain how to post pics i will gladly show them, some mindblowing ones!