I had a few adventures with my tablet through the Android 3.x series where it would go into "deep sleep" if left overnight. There were three OS updates almost once a month from Asus until they made that "feature" Go Away.

I'm speculating wildly but it sounds like someone in Google-land loves "deep sleep" in Android and how it improves battery life, thus why it's back. Unfortuately they don't understand why the great unwashed don't Get It. Such a person likely has atypical Android usage and hasn't had that fact hammered into their head yet.

Wade.