I also agree that this is an important feature to add. I’m also on a well and running 10 zones consisting of over 50 rotor heads.
Even in some municipal areas, water pressure is low enough that having just a bit of a delay between activation of zones helps rotor heads fully deploy quicker (which also translates into efficient use of water).
From that perspective this thread could just be named ‘Valve Delay’ - which is how the feature is labeled on a Rainbird controller (and appears to be a standard feature on most of them).
Please keep us updated on how development of this feature is proceeding. While tech support was able to suggest a couple of work-arounds the end result effectively defeats many of the other advantages that Iro brings. Although I must admit that the remote access still makes the investment worth it.