Great idea getting a second opinion from Dr. Remzi. My primary concern about a pouch redo if you do indeed have Crohn’s is the loss of small bowel. Since loss of functional small bowel is the biggest challenge with a Crohn’s diagnosis, you want to preserve as much of your small intestine as possible.
If your j-pouch is otherwise healthy, ask about pouch advancement surgery, where the rectal cuff and anastomosis is removed, and the existing j-pouch is brought down and reattached. Ask Dr. Remzi about it.