You look great, the quads are very good, the upper body is also very good. Yes, work on the posing, mainly your posture, stand up a little straighter and hold the head higher in the side poses, suck in the abs more.
On the back double biceps pose, open the back, you're hold it with the clavicles kind of close toghether, spread them after you hit the pose, It's all a matter of practice and lots of it, so you do it without thinking about it, otherwise if you're on stage you may forget to do it, since there isn't a mirror up there.
Good luck.