Legs r lookin good! Imo teh pics you took 4 teh MrGBIII were at bad angles and made ur legs look worse than they actually were.
Correct me if I'm wrong, but I think u said you train shoulders with legs during same w/o? If so, I would devote one single w/o in ur split to legs alone. Uv been in teh game long enough to know there are'nt any secrets to leg development. Consistent squats, leg presses, extns, curls. Stick with teh big basics and pound em!!!