Quick reply, its late and after a full day of biz negotions, I'm beat.
MCC_MAXIMIZE_WINDOW works here. Are you specifying a zone in MCC_MAXIMIZE_WINDOW, as in, for zone 1:
mc16.exe /mcc 10027:1
I'll follow up in the morning if others haven't already assisted you.
Edit. MCC_MAXIMIZE_WINDOW and MCC_RESTORE_WINDOW target only the main MC window. The commands do not appear to target detached display view windows.
You can create a detached display view window for each zone, and MC remembers each zone's detached window location, and max/restore state. So, play your view, say in Zone 2, let's call if The Video Zone, and detach / move the display window, and set the state in which you'd like it to remain.