Litemyster, had my JPouch 6 months ago. my journey sounds similar to yours. I had a diagnosis of ulcerative colitis which was 'will treated' with diet. I was on asacol but really I had no symptoms. I could miss doses and not notice a difference.
I was routinely screened and were monitoring a patch they considered to be low grade dysplasia. For nearly 10 years I resisted the operation (I just felt it was fine). Each visit to the docs they got more alarmist, until finally be gave me an ultimatum. He said it was a DALM (dysplasia associated legion or mass) and would lead to cancer if I didn't already have it. He said it needed to be removed immediately and also reasoned I had screening as a preventative measure, if I wasn't going to act on it there was no point in screening. Biopsies always came back inconclusive but second opinion supported my doc so I had the big decision
I opted for JPouch and was in hospital 4 days later (if you know the British NHS that is Amazing). I had the 2 step, ileo and pouch creation first then connection in stage 2.
I will say at the time (and maybe still) I was angry. They could find no signs of any dysplasia on my removed colon at all. I felt like it was all for nothing, however I realise in that position docs were correct to recommend surgery. And I could do nothing but accept there advice when the big chips were down.
JPouch works well with Ulcerative colitis and is in fact a complete cure! You can't have UC without a colon! The picture isn't quite as clear for Cohn's sufferers
Personally I didn't get on with ileo, but I only had it 3 months, also end ileos are better than the temp ones (which move grow and shrink).
I think established wisdom is to head toward JPouch, you will get a few months on the ileo anyway and can stick with that of you like, but pouch will give you hope of you don't get on with it. I can't really think of a reason not to try a jpouch if your are a healthy now but it is your decision.
You should really find a doc that loves JPouch if you are going to proceed in that direction. You wouldn't trust a chef that doesn't like food....
Wishing you the best, this forum is amazing way to find advice and guidance. No question to large/small or embarrassing lol.