Thanks for the video it was cool to listen to his views on the Fantastic Four. Some things have stood out to me from the interview, that may be the reason why the books aren't selling as well. The relate ability of the characters seems to be put on the back-burner, some of the issues they face should different from facing supervillains. He also mention humour between each other, that seems to have been lost along with the fun of exploring new imaginative places. They shouldn't be stuck in New York or on Earth all the time, and notr all of their threats should be from villains.
To return the F4 to their former glory, they should bring back the fun, quirkiness and adventure back. And no more retreading the same old villains and places all the time, Dr. Doom should not be an enemy for a long time. And no more going to the negative zone, it's no longer a new and interesting place.