I just think the origin story should be a backstory, even as you say, the whole, they knew each other, etc.
But due to the way the MCU developed, they lost their chance to be the first, as they were in comics.
So an idea 'like' mine, could go there. (my idea about dead Reed and the rest looking for him throughout the multi verse probably doesn't serve that).
i'm not against their classic origin, but
I'll never, ever be able to convince my wife to see it with me. She is probably the most vocal anti-FF person "fan" you'll ever meet. She totally hated the previous movies (and we never saw the very last/different one)
So I won't even tell her about the various Easter Eggs or things.
She'll be surprised when we finally see Dr. S 2, perhaps if that depiction of Reed warms her cold heart (she likes Krasinski a lot) maybe she will changer her mind.
But it is part of the reason why I want the FF 'seeded' through other properties.
A stealth maneuver to trick my wife into liking / giving the FF another chance.