It seems a big complaint on the exhaustion issue is the time people are able to play. Many of us have time restraints that only allow us to play in the evenings most days and by then our little people are wiped out. Switching the day/night still means that most of the time I can play I am either sleeping or busy. Switching would make my peeps ready for bed at 10:00 am rather than 10:00 pm which means my peeps would be waking up around the time I am busy with night-time mom duties, then bedtime for myself. I do think an option to decide what time morning is for our people would help a lot. For instance, I generally play after noon, sometimes only after 5:00. If I could set my peeps wake time at say 1pm rather than whatever time they currently wake up (7am, 8am?) then the times I am able to actively play would coincide with the times my peeps are well rested and ready to be played with.

Just a thought.