RebDoniel: As much as I empathize with your ap[proach and your post, and am familiar with many of the products you bring up, and as much as I am not a chumra shopper, when it comes to Pesach, I think that it must be remembered that the reason there is so much “over the top” stricture is that the issur is on a kol shehu, and larger amounts or possibilities only affect the onesh, not the issur. So in observing one of the first mitzvos given to am Yisroel, many people will justifiably put themselves as far as possible from transgression.
I am skeptical of R’ Maroof’s allowing the use of cereals, for example. Are these on their own product line, and to what standard are the processing machinery cleaned? What is used to clean and lubricate them? What might fall under botel b’shishim for kashrus purposes doesn’t cut it for Pesach.
This is one example.
Though there are many things in your post that are good ideas, I would revisit some of the others as insufficiently certain for most of the readers here.