AD-HOC for Xbox One online worlds that don't require the creator to be online if they don't want to be for that world.
As far as I know, most, if not all of those suggestions will be introduced in the next big update.
"When is that", I hear you cry...? Dunno... How long's a piece of string...?
At the moment, the best we can do is gauge a rough estimate for arrival dates based on snippets they preview on the Twitter page, so you're just going to have to be patient.