My pouch was well built but my body didn't like it anymore than it liked my colon. I tried for 5 years. Every time it developed a problem it became chronic. I too changed my diet, VSL#3DS , rotated antibiotics, used suppositories every night and for the last 8 months before surgery was on a soft food diet and had to give myself at least 5 enemas daily. I had chonic cuffitis, chronic pouchitis, IPS, adhesion pain, strictures and pelvic floor dysfunction.
8/31/15 I had diversion surgery to a permanent ileostomy. I didn't think I could handle excising the pouch and recovery from that surgery now. It appears to have calmed down. It took me almost 2 months to get an appliance to stay on for at least 2 nights. I asked for my stoma to be placed in a place that isn't the best as the other options were at waist level.
I'm able to eat food again. I am getting back to a better quality of life. Looking back I wish I'd done this at least 18 months ago.
It's a personal decision that only you can make. I liked the idea above of making pro and con lists.
Good Luck