There are people that don't use it ??
I use Day Off mode frequently. Every time there is someone home on a normal work day. Like today...or a week day bank holiday.
What I would have liked though is for day off mode to have its own schedule rather than just clone the schedule of one of the days of the week. I have it set to use Saturday's schedule however on a day when one person is staying home and the other is going to work I really need a different schedule to Saturday.
I need the early start from the week day schedule, but with it remaining on through the day like Saturday's schedule. So I end up leaving it on the weekday schedule and then switching to day off around the time when the weekday schedule would have turned things off.
One other thing I would have preferred for Day Off is if it wasn't a quick action at all - it really should be independent of any of the quick actions. For example its not possible to use the eco mode in conjunction with day off, nor is it possible to use the custom action in conjunction with day off mode. (If you think combining day off and custom doesn't make sense, keep in mind that custom is an overlay that only affects zones that are specified in the custom config, so it does make sense for them to be able to work together)
This is an issue if for example I want to use the custom action to go to bed early but have it revert to day off mode at midnight because the following day is a holiday - not possible with the current options...