dear funkodrunko
you definitely have a winged scapular but that doesnt seem to be the only problem with your scapular motion...both scapulae appear to be sitting low, with the right worse than the left...while they seem to rotating adequately, they are doing it in the wrong plane in relation to your thorax, this would cause impingement even with a seemingly full range of motion...
your physios need to look at your overall posture.... working on external rotator strength is not enough...your scapulae need to be repositioned properly to stop the impingment happening...
all that throbbing you getting is muscles overworking to compensate for faulty scapula motion...
your serratus anterior may be weak, your trapezius looks long on both sides at the shoulder level, your rhomboids might be long too...
your scapula depressors might be short too...your pecs minor maybe long
having bad scapula motion affects rotator cuff stability...
address this and you should see some improvement
best of luck