... its damn near the single biggest bang for the buck "mod" you can do on an FI car, How can you not? The car needs to be adjusted, and or ... modified... in order to run it. I'm sure you'll explain your reasoning, but I'm having a hard time seeing the logic there.
E85 is a 'mod' of the same ilk as Mobile 1 oil - it just adds exponentially more HP. See it as you wish, cause I won't change your opinion, and you won't change mine.