The vagina also has its own physical support independent of the cervix, and the cervix is not necessary for vaginal support. Removal of the cervix therefore does not seem to predispose to vaginal prolapse. Vaginal delivery of babies seems to be the main thing that predisposes to that. Yes, this has been reported in many articles in many ways. The risk of finding new endometriosis in the pelvis 5 years after complete excision is only 19 percent, and it is minimal when found.
Symptom relief depends on whether the pain was due to endometriosis in the first place.
My gyn say he couldn't remove it. He said it would cause bleeding. Yes, endo can be removed from anywhere in the body by an experienced surgeon. I routinely find myself removing it from the bowel, uterine arteries, ureteres, bladder, etc. My first lap the doctor didn't know that stage one could be removed, he told me I had nothing to take out.