the best powered-down fairway is a mid.
I've heard all the explanations on here, but nope, I still don't agree with it. Doesn't mean it won't work for someone elses game, but it's a bit of a ridiculous prospect. The "internet gurus" expect you to throw a putter for everything 300 feet and in, yet they also want you to power down fairway drivers, blah blah blah
From a strictly physics prespective, I would assume as long as the thing you were"powering down" wasn't really overstable, you'd be all set.
I think you may have missed the point a little on a couple of the discussions you're referencing (or read posts by folks who didn't really know what they were talking about). The people who understand discing down and mold minimalism only talk about powering down on overstable slower drivers to cover overstable mid and putter shots. None of them advocate replacing your normal mid shots with a powered down fairway, nor do they advocate throwing a putter for every shot inside 300'. Some people who don't really understand the point of those two concepts have taken things to silly extremes at times but don't let that make you miss the point of discing down to build good form and minimizing molds to build consistency and versatility in your line shaping ability.