It would be great if when publishing a playlist, that computer or tablet would have the ability to determine what rights the other systems that join it have. For instance: maybe I start the playlist from the computer that's attached to the projector, and I want to be able to edit the list from my tablet, but not from the tablet in front of the piano player. I think something as simple as having a "follow only" setting would be great.
In addition, I'd really like to be able to have multiple systems able to control the lead simultaneously. In another request, I noted my footswitch which sends keystrokes to the computer. I use this to control the presentation. Once in a while, it would be nice to reach up to my tablet and make a change. If I take the lead on my tablet, then my footswitch no longer controls anything because the computer it talks to is now just following. Allowing both systems to share the lead would make my life a whole lot easier.