I'm in full agreement with you that natural healing during sleep is quite powerful, and I was originally tossing around the idea of decelerated healing (or zero) during the first hour or two of sleep, gradually ramping up so a six-hour cycle would net the same as current, long rest would do much better, and quick naps would leave you wanting.

I'm unsure how to proceed as for the balance of this issue, so I tried to leave the original code intact as to fiddle with it as y'all see fit. I'm not trying to reinvent the wheel, just implement a suggestion.