I don't know much about dysplasia, I think it means precancerous, but I am not even sure about that, lol. Anyway, I think pretty much everyone here will tell you that life is so much better after surgery!
Whether you have a j-pouch or a perm ileostomy is a very personal decision. I can tell you why I chose what I chose though.
I had UC for 8 years and got tired of being sick so Iwent and I said, take it out! My GI tried to talk me into a J-pouch but after doing alot of research on it, and talking to my surgeon I decided on the perm ileostomy. My surgeon said that was what he reccomended so that was one reason. A few of the other reasons I chose that were that the jpouch requires two surgeries, and some people, after the take down have to go to the bathroom like 30 timesa day at first! And it can sometimes take a year to get full control over your bowes and even then you can still expect to go 4-7 times a day, with some urgerncy, well that was part of what I was trying to get away from! Also, the jpocuh can develop pouchitis which is apparetnly icky. THere is something called a koch pouch, which I thought about doing, it is where they make a pouch out of your intestines in you stomach and you stick a catheter and drain it a few times a day. I thought that sounded like a good idea, however up research I found out only 500 people in the US had had that surgery done, and I didn't want to do something that was so new. Also, there are only a few places in the country that do it.
Having a bag isn't the funnest thing in the world, and it has drawbacks too, it's kind of a pain to have to fiddle with it, and take your stuff everywhere you go. If you have a leak, it's rather gross, but it's better than being sick all the time, and I haven't had much trouble with leaks, at first I had some user error problems, lol. And i won't lie, the surgery part is really not fun. But I am two months out and I am feeling so much better, most of the time I forget the ostomy is even there. I am still a little paranoid and change it more often than I need to.
Anyway, everyone here is very helpful and is great about ansewereing questions.