Many years ago I found out through an MRI that the acromion bones in both my shoulders had never formed correctly, which made both of my shoulders weak. Explained a lot about my youth, inability to throw or climb worth a shit, pushups, pullups, arm wrestling, etc. Fast forward, got a "full thickness tear" of my right rotator cuff working for Home Depot. Just ripped it completely. Ow. Got it fixed, and doc removed that deformed bone too. Funny, I don't recall the recovery being that bad. First visit to PT the therapist asked how high could I raise my arm, so I swung it up and pointed at the ceiling, and he just about shit. My range-of-motion was freakish for the surgery I'd had, blew his mind. So anyway, I healed up fine and pretty quick, don't ask me how or why. I did all the PT, it just wasn't that bad for me. So I guess I'm not the right guy to advise.....