Hi resolumes!
there is one very usefull thing for online vjing - to change quickly geometry presets from hotkeys - for example vj can make some areas with cameras and content and in any time to change it. I think it will be helpful.
Another tip is for some repetitions, may be specific, but so usefull too - ability to link some videos together. for examlpe we have for clips in 4 layers, that located in one column - we can play it synchronously, but we can't rewind it together.
Dmnik