I think this is worth clarifying - It's not Studios anymore, but it is still Hollywood. Hollywood Boulevard remains intact as the opening act of the park and Sunset Boulevard is a strong supporting player to it. Echo Lake is also, in part, still Hollywood manifest. The changes to the park in the last decade have undercut the park's Studio guise, but the Hollywood-specific elements have stood strong, indirectly affirmed (though not particularly emphasized) by the new themed lands and attractions. Star Wars is a product of Hollywood. Toy Story in its way as well. Mickey, of course.
Point being, I agree that the park needs a clearer identity, but I think the most direct path to that is actually to play up the existing parts of the park. They've moved from the idea that this park is a working Studio operation - fine, but then develop a new idea of what Hollywood means to Disney, how that idea is expressed by a place, why guests should want to go there, and do those in a way that's inclusive of what currently works within the park. "Hollywood" isn't really the issue, scattershot execution of it is. Especially because those thematic elements don't inherently disagree with the park's intended audience. Expand and enhance the existing profile, which could be corralled into something cohesive without undoing the good remaining framework.
With that in mind, I would suspect a type of Villains Land could be worked into DHS in a way that furthers the thematic consistency and targets the core market for the park, though realistically it doesn't seem like that's on Disney's list. I've been getting the impression that a Villains Land for Magic Kingdom is one of the D23 Blue Sky concepts that they're taking more seriously. Though it remains to be seen whether it will actually be selected.