In the sport of Figure, symmetry is EVERYTHING! Being lean brings out imbalances EVEN MORE because there is no fat to cover em up come stage time!
When I first began posing practice for figure the winging in my right scapula was BLATANTLY OBVIOUS. Posing coaches will tell me to lean to the side or contort myself into some crazy position that felt like SH*T, but hey its all about the symmetry they'd say... beauty takes pain ;)
I am lucky to work alongside one of the greatest corrective exercise guys in the biz :) He lives, eats breathes this stuff. Alignment, activation and symmetry are his forte.
Here is an awesome exercise that forces your scapula to track properly!