You're right. Cranial Sacral therapy does help in some aspects, but it will not overall heal your TMD. When I had mine done, I could notice a change in my body, but my jaw was still the same.
In my case, my left jaw joint was (is) degenerating and there wasn't much they could do about that but to stabilize my jaw with a splint. That worked, and now I've got surgery ahead of me and what-have-you.
CST is good and relaxing though.