(apologies if this comment posts more than once, but the site is giving me error messages)
I am sorry that you have experienced so much trouble. Although I am not an RNY patient, I had a thought: Has your surgeon looked into the possibility that you have an enlarged stoma? I have read on this site about some people whose pouch stoma stretched out and therefore the food didn't stay in the pouch long enough to keep them full. Just a thought, since staple line disruption isn't always the culprit. I hope you get some answers on what's going on. Good luck.