I'm curious if getting double-tap to work in an upcoming version of the API is on the roadmap anywhere. Mobile editing is pretty key and although the hack I posted still works, I am finding it can interfere with some other click events on the map. I am still trying to work around this issue in my particular case, so it may work fine for others. It would however be nice if the API could check for touch events and fallback to those as needed behind the scenes.
By the way, I have created a widget that implements the above hack.
odoe/esri-simpleedit-widget · GitHub