How to change the profile picture of your Facebook account directly from your phone having WP 8.1 developer preview? (as you did in your WP 8 via ME tile)
I think it cannot be done like we used to do in wp8. Now you have to connect your FB app with your phone, and you have to do status updates and profile pic changes through the app. There's an alternative way to update the FB and other social network accounts through a third party app called 'My Social Share Target'. Through this app we can have the earlier functionality. Have a look! My Social Share Target SL | Windows Phone Apps+Games Store (United States)