Reverse Compatibility
I think Gannon would be insane to not pursue this revival with reverse compatibility for the original sets in mind suddenly, as he has stated several times it was his goal to do so.
It almost seems like people just want the old cards to be forgotten not because of power creep, but because they didn't hold onto any of their old collection.
I don't see why many are so keen to "Hard Reboot" the game (whatever that is supposed to mean) to prevent old cards from even being played, as opposed to just embracing alternate formats. No one is expecting old codes to be available.
Simply disallowing older sets in competitive play/locals/tournaments until they are readily available through reprint while making sure the game is still compatible with legacy cards for casual play seems like the best of both worlds for everyone.