Suggestion:

Every 2nd set. Or maybe even just once a month.

Change the express start/finish time back 12 hours. Then the following set put it back to normal.

That way it doesnt benefit group X all the time. (If the current time is most beneficially to the majority then just apply a change once a month so others can have a go)

I like this idea!

I checked and 12:00 GT is pretty much the time of lowest activity.

(maybe thats lowest activity cause those people know they cant finish the set so they dont play at all)
lol


Any time change really, i just said 12 hours cause it was an easy and round number. Maybe 8 hours forwards or backwards then?
Cause 8 hours would move it from some peoples sleep time or work time.