Here is something that would be useful once a year. Allow us to manually run all zones for X minutes each with Y minutes between each zone ending and the next starting. You could also add a feature to repeat each zone Z times.
Here would be my usecase. I setup an air compressor to my system and want to blow it out. My compressor has limited capacity so I cannot just run all zones consecutively. Currently I need to manually start a zone for 3 minutes. Then wait 5 minutes. then do the next. This could all be automated by the rachio in a fairly easy manner.