Well, as I'm not a big fan of the FF comics, I'd say the movies delivered pretty much what I expected. And I don't think that the Disney movies you mentioned were in any way better or more mature than FF. But to each his own.
Well, the movies I posted as example were obviously meant to be g-rated movies, however I was using them because I wanted to make the point that they still stayed fairly intelligent for the kind of movie they were.
I don't think F4 did this at it's respective level. It felt a bit dumbed down to me.
However, back to your topic, on the whole I'd say many movies today don't really need a reboot. Punisher for example. I don't think this movie needed, or will need, a reboot. Pretty much everyone gets the idea of the Punisher, just continue on. You don't even have to reference the past movie, but we don't need another Origin story.
Same for the Hulk. Even though I liked The Hulk better then Hulk, after seeing it I kind of wondered why they felt the need to reboot, because it easily could have taken place after Hulk. Now, I understand that they needed to fit the super-solider plot in there to tie in with Avengers, but if they really want to make a reboot, they I felt like they should have distanced the style even more from Ang's hulk.
Now, you might think I'm crazy for saying this, but one of the few marvel properties that I wouldn't mind (but don't think it necessarily needs) getting a reboot is Spider-man. I haven't been a big fan of Raimi's SM movies since SM2, and I would really like to seen a new reign take over. Now, I suppose we don't necessarly need a reboot, because his origin was done well enough, but I want to see a movie where Peter is actually witty as Spider-man, and Spider-man and Peter Parker are two seperate personas, and a Spunky MJ.
Really though, the biggest reason I want SM rebooted, (well besides my qualms with how Raimi handled the character) is to see the death of Gwen Stacy done right on screen.