Poor Abdominal Fascia

I had an umbilical hernia repair following 4 pregnancies. The surgeon found that I have very thin fascia, and he put in a large piece of mesh that covers from my diaphragm to pubic bone, and way out to the sides. It is underneath the muscle layer, put in place using staples. I still have the diastasis, and my belly pooches out like I am still pregnant. At times I can suck it in nearly flat, but then there are times that it looks swollen. Can abdominoplasty be done? What about the mesh?