Our work with elite athletes serves as the proving grounds for our methods. Most people don’t play professional sports. But if our methods help athletes at the highest levels, they can work for anyone.
crossover symmetry is also good, but you have to watch out – they also want you to squeeze the shoulder blades together at the end of each movement which i think is bad according to the new ways of thinking. but you can do the exercises and just stop short of squeezing the shoulder blades together.
getting with a good coach who can cue proper movement of typical exercises would also be a good idea.
scapula problems can also be related to improper posture esp at the t-spine. so finding someone to help with posture would be good. a lot of the pics you show could indicate you are curving the t-spine towards the front. you will need to work on putting the proper curve there – usually it is the result of pushing your chest out (like a stereotypical military man!)