I have tried to seek for the topic but it seems no one worries about it. Looks like I am the only one struggling to work with C3 on my smartphone.
It would be useful to be able to drag events by touch on the event sheet, as for the mouse on PC. Or just adding some extra options to the contextual menu, like 'indent event' and 'push above / push below'.
Working with a smartphone, I can't indent an event or push it above or beneath. So it's all a matter of cutting/pasting once and once again. It slows down the proccess.