You can set a master on adjustment to have master turn on a few seconds before zones.
I understand the idea of logic zones, but it can significantly complicate the firmware and UI design. We have to think of a lot of cases and how they should be handled. For example, should logic zones have their own attributes? (i.e. master activation, ignore rain delay etc. and sequential group), if so does its attributes take over each zone’s attributes? It also creates complications when the logic zone is being turned on or off while the user also wants to turn on or off one of the zones that belong to the logic group. Which one takes priority? So if we implement it, there will have to be some very strong restrictions on what are allowed and what are not allowed.