Frameworks work well for visual design, adverts, web design, music (to a certain extent), so I can't see a problem with them for films.
Of course, if one framework becomes the One Possible Framework, that's more of an issue. But there are enough filmmakers out there willing to try seriously wierd shit that I don't think that's a problem yet.
For example, David Lynch is working on a new feature film right now. Call me crazy, but I don't think he'll be sticking to Save The Cat's formula.