The numbness was resolved, I have not experienced any for 2 years maybe. The weakness has been resolved to a certain point, however I still have an issue when executing push ups and pull ups are out of the question due to the pain mentioned. Bending my head towards the left armpit causes pain also if exaggerated. 

I was wondering, how great is the relation between scapular positioning and core stability, cause i noticed than if I really brace hard, like 75-80% when retreating the shoulder it does not wing really, without load.