The number of times I start out with a non-script action and then later need to convert it to a script action due to more sophisticated requirements is a lot. It's also easier creating things in a GUI, especially for things like opening popups which have a large number of parameters.
What would be REALLY nice, would be to have a right click option to convert the event into a Script action instead, which passes in all of the existing config. This would match the functionality currently in Vision.