The shoulder on the far right looks fine enough to me, maybe because you are mostly simplifying the muscle into blocks. They might feel a bit too wide for female? Or the illusion might be from the shoulder being straight. From the pose, both shoulders might need to be stretched backwards more, this will lead to the shoulder on the far side becoming less visible, mostly hidden behind the chest.

Hey Lynx! I think that pose exaggeration is always a great exercise, however, I think that you are maybe lacking on something essential. When we exaggerate we do it with a purpose, what is it that you want to reinforce: is it the attitude? maybe the action of the scene? Thinking in this terms will help you achieve a more believable exaggeration imo. Also, be careful with the balance of the figures. The left figure seems like she's about to fall down. Try to always imagine the character in a sepecific situation, that will help. Other than that, pretty good job with your mannequins. Proportions work pretty well! I hope this was helpful

these are looking cool! has a comic vibe to it!