Facebook gets burned whatever it does, so it's probably thinking it's not worth trying to fight it anymore; if people are going to be angry, at least give them to be angry about.
That’s what it seems to be thinking behind an experiment that enables apps to bypass permissions dialog and load instantly.
This is being tested
for games, which now load as soon as you launch them. Users do get a notification dialog indicating the permissions required by the game.
If they're interested in finding out more, they can; but, by default, they'll be able to dismiss the notification and carry on gaming.
If the feature ends up being implemented, that's what the vast majority of people will do. Which is probably not a good idea; people should be more careful about what they concede to play a silly game they may not even like, in the end.
Then again, people ignore the current permissions dialog, which is served as an interstitial page, as well, so you can't really fault Facebook for giving people what they want.