lkh,
Your reasoning is sound, but I would point out that the author of the book I read on Paleo for autoimmune disease would disagree with you strongly on your guideline #2. The main focus of that diet and the main difference between Paleo/autoimmune and low Fodmap is elimination of the nightshades. According to the author and the more stringent disciples of this diet, nightshades = evil. To use the religion analogy, playing with nightshades is like consorting with Satan. I am not endorsing that point of view- just pointing it out to those who truly wish to be educated on this subject. Also, the author has a different take on legume consumption as well. See this:
https://jet.com/product/produc...2X9McCFcMXHwodnSIAPA