I was dx'd w/UC in '82, had a jpouch made in '93. Never did as well as my surgeon expected, in that I had more frequent BMs than "typical" - maybe 15/day, give or take, and, as time went on, had more issues: pouchitis, cuffitis, rectal cramps, fevers, headaches, night sweats, etc. (flu-like). My original surgeon decided I had Crohn's in my jpouch, however - this was just a "visual" dx. He was not aggressive with his treatment and things kept deteriorating.
2-1/2 yrs. ago, I developed a fistula (3), and went to the Cleveland Clinic. I was actually there this week for a scope, and as my cuff is still very inflamed, the ATZ is narrowed (which causes problems with elimination), and with the fistula, the surgeon up there believes I have Crohn's colitis (biopsies pending). Seems the Crohn's is limited to the cuff area, or the remaining rectal area.
Current treatment is canasa suppositories which treat cuffitis - or I assume the Crohn's - at the source. The surgeon (Hull) said there are other alternatives: biologics, more surgery, etc., but I'm sticking with the canasa for the time being, as the area affected by the "crohn's" is limited, the Canasa is effective and I have not experienced side effects with it. Am doing well with the canasa and will include self dilations which were recommended.
There have been ups and downs with all this, but I think the key for you is to have a super surgeon with a LOT of experience with constructing pouches, and - just as important - someone lined up for you to see afterwards who knows how to effectively treat any jpouch issues that may arise.
Please feel free to PM me if you'd like to discuss anything in detail. Best wishes.