OK some joy here!
The virtual device swap then swap back was brilliant. Worked like a charm.
I set up a virtual dummy dimmer and one by one swapped the rogue ZEN77s to it, then deleted the rogue ZEN77, factory reset the ZEN77, added it again through a fresh include, then swapped back the virtual switch to the new device (I gave it a slightly different name Kitchen Ceiling 2 just to not confuse with the original one). Then I loaded the special driver (I believe jtp10181 was the author) for ZEN77. I did move Hubitat to inches away from the rogue device during this exclude include cycle, just to limit things that could go wrong. I will return Hub to proper position and reheal the ZWave network.
Now the dashboard faithfully lights up when device is on and goes dark when off.
One slight difference, not sure if it is a bug or a design choice.
With the native ZEN77 driver when you turn off a dimmer the slider returns to 0 position in addition to turning dark. With the new advanced driver the dimmer tile turns dark but the slider remains in the last set position. I guess like the old push on off dimmer in days gone by turning on returns to prior dim level. So the slide shouldn't mean what level the light is rather what it will be if just turned on.
Anyway trying to wrap my head around if I like it this way or not. Is there a config field such that slider behaves as does in the native driver?
