The front of the saddle is slightly misaligned. The back is straight but the front isn't even. Make sure when you're completely cinched up that the saddle is even!!
When you are fully tight, the center D ring in your cinch would be in the middle of the horse's legs.. atm it's too far to the horse's right. Was he fully tightened when you took this pic or was the cinch loose?
Also the breast collar needs to get adjusted shorter so the middle is in the center of the horse's chest BUT not so tight that it cuts into their body when they put their heads down. But atm it seems loose.
Before you cinch up, pull the top of the pad up so it's not sitting on the withers.
Otherwise pretty good :)
"Strength is the ability to use a muscle without tension"