All of these are great ideas, and I do love the flexibility of being able to chop and change pickup configurations in Strats (and Teles).
But just going back to the thread title for a minute: "The Stratocaster: The guitar of Ultimate Versatility?"
Yes, it's very versatile but no combination of pickups will ever make a Strat sound quite like a Les Paul, SG, 335, or a Gretsch, or a Rickenbacker. That's not a criticism, just an observation. :P