Y'know, I think that in the end, that was a whole bunch of Quesada flapping his gums that never mattered. He was trying to do damage control that the 'deal never happened' because let's face it, keeping one of Marvel's most famous heroes having made a literal deal with the devil is, as the kids says, A BAD LOOK. A real bad look, you might argue. So the easiest way to try to handwave that away was that "there was no deal anymore" to try to pretend Spidey didn't make a deal with the devil.
If that was true, Mephisto'd have no way to know when he first showed up again in Spider-Man/Deadpool; and if Norman's own deal made OMD stick, that's even more of a head scratcher, because since it took place BEFORE, then the deal couldn't ever not have happened - it'd legitimize it all along. I say that because stuff has gotten so messy, I don't doubt Marvel might try to play this card.
All it'd have took was a single sentence: "we admit it, One More Day was a real bad idea", but I digress.
That also leaves an elephant in the room, though: Spencer's using MJ seeing a therapist. MJ saw a therapist because she lost baby May. So... was MJ pregnant during the Clone Saga or not? Because Quesada liked saying they wouldn't conceive unless married, but much like "the deal never happened" that wasn't really stated in comic pages. Only in interviews.