The FAA always seems to mandate changes to the larger air traffic facilities but rarely mandates the same changes to the smaller facilities (ATC 8 and below). My last three years in the FAA all my mid shifts were worked by myself, prior to that at another facility I worked tower and approach during the mid shifts by myself (10 years). Did I ever fall asleep during a mid, YES.
As I've said before the shift rotations that we worked required quick turns (only 8 hours off between shifts) which often resulted in a controller getting less than 6 hours sleep between shifts. Calling in sick because you didn't get enough sleep was discouraged and would often result in disciplinary action.