After a lot of consideration, I canceled the acupuncture and scheduled with a chiropractor who specializes in shoulders AND Active Release Techniques (ART). I think this stands more of a chance to effect real change - my own unexpert soft tissue/joint capsule work has had positive effects, so it seems reasonable to expect targeted work by a true specialist to help me reach my ultimate goal. At least I know where to go should I decide to try acupuncture at a later time. I just wish my insurance would cover some of this. The chiro I am seeing has tons of qualifications/experience in biomechanics and nerve entrapment. This sounds hopeful!
I know that ART isn't pleasant, but frankly I don't care about that - I can handle discomfort if it gets me where I need to be. BTW, the sleeping position appears to have more of an effect than the tape does, so that has been solved.