This is tiny and rather insignificant, but would be a silly easter egg. Instead of knights doing the "sleep" animation after 5 minutes of being idle, when in a Starlight Cradle level set, have them fall asleep after 1 minute of being idle.
It's a sleepy lullaby land, and if you aren't lulled to sleep there I don't know where else you'd find a nice place to slumber so easily.
And make people sleep when idle slower in IMF, those industrial noise and explosions are good equivalent to caffeine.