I'm not sure what an SCD diet is but I am on a "see-food" diet. I have found nothing that I can't eat. Seriously....I eat like crap!! I'm sure if I tried a pound of celery or something it would be a different story. My advice.....just take it slow and find out for yourself. Some people do have trouble with certain foods while others don't.
I was down to around 130 pounds before I begged them to take the miserable jpouch out of me. Now I'm a fat 195. I'm working on losing a few though. I lift weights and run.
As far as quality of life goes, I am WAY better off than I was when I had UC. The only inconvenience is emptying the bag every 3-4 hours and I worry that I will make some weird fart noise in a crowded, quiet environment. It's never happened but I still worry about it. I could wait longer on emptying but I never know where I will be so I take advantage of it when I can.