I still have the option to do a reversal from my ileostomy to a J-pouch. I have decided, unless something changes my mind in the next several months, not to do the reversal. I'm just wary of my body adjusting to it. My first full year with the bag has been pretty good. Personally, I don't see a J-pouch adding much to my quality of life even if it were to work flawlessly.
My surgeon has not rushed me about a decision, but says I need to make one at some point. Either get the reversal, or have the proctolectomy done. He tells me it's to much of a cancer risk to leave the bottom end of the plumbing in place and disconnected. I meet with him again this October, probably to schedule the protolectomy.
That said, it comes down to a personal decision, whatever you think fits you and your lifestyle best.