Based on games I've played/others' comments, D&D classes seem fairly balanced for ~2-3 short rests per day.
Ok, if experience says this, I hope they will make 2-3 limit.
Yeah, yeah...I know. I still don't like it.
Even if some HP reflects mental durability, will to live, and luck, that leaves some HP as physical injury. If my character reaches 0 and is unconscious and dying, I would hope it's because of blood loss and not because they've lost their will to live. But, sleep for 8 hours and they're totally fine!
When this system is treated properly, the last blow, which leaves you with 0hp, is the one that's an actual wound. Everything before is just the exhausting struggle, which leads to be injured. And to return from 0hp you need some real healing or lucky d20 rolls with no modifiers.