Would it help, if I published the command to put the controller into "Day Off With Eco" mode? Then those with an HGI80 or similar can atleast benefit from the feature. Looking at the Domoticz, I don't think its a quick fix, to introduce the new mode, so could be a while.
Just that from the Controller UI, there is no way of easily telling it's any different than the normal "Day Off". It's only when you look at the zone setpoints you notice they are all set to your Eco/Boost setting while in "Day Off" mode.
The "Auto with reset" mode that I also found is less useful.