Is there a shift now in what people expect from their films and what they're willing to overlook?
Movies like
Prometheus,
Skyfall,
Star Trek Into Darkness, etc. get ripped to shreds in analysis, but are still pretty favorably received. I don't think it has so much to do with expectations, but that each of those movies has a lot going for it (outside of the poor writing) that makes them entertaining to watch. They fulfill the "mindless entertainment" quota that satisfies a large part of the movie-going public, and falls into "willing to overlook" to a lot of people who acknowledge the problems but enjoy the virtues.
But there's a pretty big difference in what a film like
The World's End can get away with compared to
Prometheus. By it's nature, an "apocalyptic farce" brings a different set of expectations to it than a movie that is supposed to be entirely believable.