I'm replying to this old post because its the only one on the forum I can find that mentions Resistant Starch. Although you suggest that the information may save a colon, it may have just saved a pouch.
I have been taking resistant starch for the past 3 weeks and the results are pretty remarkable. I've not had calprotectin results back yet but it is obvious the benefits this one small dietary change has made. Coupled with psyllium powder my output has never been as good. Digestion is clearly improved and I am experiencing no pouch discomfort with 4-6 BMs per day. There is a lot of evidence in the literature supporting RS. My own understanding is that RS is a probiotic and carries the bacterial overgrowth out of the bowel whilst causing a decrease in Ph and a by product is butyrate which nourishes the new colonosites that make up some of the pouch mucosa. I am currently on no medication with this protocol.
In addition, I had by fecal microbiome sequenced by uBiome which showed a clear dysbiois. My GI was unsure how to respond to the results as this is at the cutting edge of their area. He suggested maybe trying antibiotics but given the recurring nature of pouchitis my own approach is ecology over warfare.