It seems like each of us has a slightly different situation from the others. If your surgeon wants a two step surgery, I'm sure he or she has a very good reason for it - UC vs Crohn's, fistulas, inflammation, etc.....Starry, sounds like your level and cause of pain may have been why your two step. My surgeon was pretty calm about the whole process (he's also done many of these, but kept reiterating that my jpouch was the only one of HIS that he was removing...I figured let him be a little cocky if it's going to do a great job  ...so I just took his lead. I bought several microbead pillows to sit on, as I heard the butt can be sore, and never needed them. I just sort of leaned to the side for a couple of weeks. Fatigue, getting used to my new stoma and appliance. Fosty, really no different from #1 surgery of total colectomy or #2 jpouch creation. More fatigue for longer, though, so I assumed my body was doing major healing. I will say that I truly believe my body was happy that the jpouch was out and that I was no longer on meds that were no longer working and having side effects. My hair grew back in, I put on five pounds immediately and I no longer woke up with dread over what kind of day it was going to be or if a treatment was no longer going to work. Do I LOVE my bag? No, but I know how to work with it. Sorry for the long post.......
P.S. Starry, I, too, asked why this surgery was considered so difficult. This, and the fact that it was permanent, made me so scared that I gave it a lot of thought for a year before making my decision. Getting that baby out can be complicated due to adhesions, etc. Make sure you have confidence in your surgeon everyone!