I've been dialated by balloon several times and it is by far the easiest way to go. The opening in my J-pouch (I have a J-pouch) has always been small and I have been dialated many times with just the surgeons finger, without any anesthesia. Also there are instruments that range in size from 6MM to 18MM they can use to dialate an area close to the anus. I have a set myself.
I woulld gladly have dialations than resections.