This. There is no way to put the FF on the big screen unless Fox does something really different with it. The Superhero genre is crowded and being generic is the surest way to fail. Look at the diminishing returns of the Spider-Man franchise. Spider-Man right now is falls into no box other than, "superhero" and as a result, it felt soulless. Looking at what Disney was doing with Captain America as a spy flick and what Fox did with a time travel X-Men film.
Wanting Fantastic Four to be a superhero film with all sorts of slapstick and cheese is what held the Tim Story films back. The difference is between thinking that you know what you want and what you actually want. For instance, knowing that Fox is doing a Fantastic Four film based on real world robotics and astrophysics is something that hasn't been done yet. More importantly, it not only grounds both Doctor Doom and the FF as something we can relate to but it also taps into the fandom for Cosmos.
Now think of all the fun that the Fantastic Four could have exploring things like String Theory, antimatter, faster than light travel, multiversal theory, etc. That's a whole new world that wouldn't feel right with any other CBM. I mean, what other franchise can have in depth explorations of the nature of reality as a CORE theme? Even in a franchise with more sci-fi series like Iron Man or Superman, these kinds of themes would feel like the filmmakers were trying too hard to be sophisticated. With the Fantastic Four, solving problems with theoretical physics is literally the entire purpose of the team.
Also, the found footage feel is something that CBMs haven't tapped into yet. The idea of the FF filming their origin and either performing experiments with cosmic rays or taking a journey into the Negative Zone only to find that they have all sorts of crazy powers. Scientists always keep records and Johnny Storm as the brother-in-law cracking jokes behind the camera while Reed explains just exactly what they're working with is fresh, it's new and it hasn't been done before. The big set pieces can be saved for the sequel once the origin is out of the way and the brand is re-established.
I mean, the Fantastic Four getting powers and then deciding to fight evil on day one would just feel rushed. I'd rather they take time to run experiments on themselves first and have Doctor Doom be built up as a villain before he changes into an anti-hero. I'd rather see a Silver Surfer spin-off before Galactus comes to Earth. I want a small, intimate origin before the Fantastic Four become established as heroes.