I thought I had a similar injury. I went to doc and did MRI. He said my rotator was not torn, but it was bruised and had fluid on it. It was inflamed. The injury happened when I was drunk out of my mind. I had a big scrape on my forearm near my elbow. So, I recently thought that I was maybe trying to catch myself while I fell. This could really be an AC joint injury rather than a rotator cuff injury.
Anyway, both of my shoulders bother me from time to time especially when lifting heavy consistently. The only thing that helps is Ibuprofen and ice and rest/time off from working the deltoids etc... I go off for a few weeks, then light for a few weeks, then heavy for one week, then back to light for a few weeks- thats the best I can do for it to get some work. I tried IGFLR3 because I heard it may help with repair. I did not really notice anything. But after your surgery I believe the HG or probably more quickly acting IGFLR3 would be beneficial to you in your recovery from the incisions and possibly strengthening that general area as well as other muscle receptor sites. I guess its worth looking into at least. With the IGFLR3, general dosage is 40mcg/day pwo, intramuscular (muscle worked that day-or in your case just in the shoulder) generally bilaterally. You can also take it subcutaneous. You cycle on 4 weeks, then off 4 weeks. I did 2 cycles like that and hoping to see some accelerated muscle growth when I start my AAS. I did not inject subcutaneous into the abdomen as some suggest, in order to stay away from intestines (the intestines have great number of receptors that will cause some growth/expansion of abdomen). Some have said that the IGFLR3 compared to the GH is more bang for your buck, but you will have to do some more research on the two to make a choice that best suits you. Good luck.