my minecraft on xbox one does not let me enable "online world". It tells me to change my settings, but I can play online in any other game. More recently, when I go and press "Play Game" worlds list does not load. So I'm stuck with a spinning sequence of squares.
Apart from that my game has worked just fine.
http://www.minecraftforum.net/forums/minecraft-xbox-one-edition/mcxone-discussion/2205510-minecraft-xbox-one-edition-official-bugs-list