Interesting ideas but I don’t see them manifesting. Apple’s entire sleep tracking philosophy is encouraging regularly nightly sleep habits, not just tracking whenever you randomly nap during the day. That’s why it only tracks during sleep focus and only records if it’s been more than four hours. From Apple’s perspective, you’re meant to be working on a good nightly sleep routine.

I would like intelligent sleep alarms, i.e up to ±X minutes from the nominal alarm time to try to wake you during a lighter sleep phase.

The sleep features on Apple Watch have always surprised me because I used to have a second generation Samsung watch that would automatically detect sleep. I also liked that my Samsung watch was shaped like a watch.