And that the easy battle can matter that way is that makes it meaningful. I think we agree on what is happening, we merely disagree whether it is bug or a feature.
Well, that seems a tad harsh, but yes, I think overall principle has appeal. I think it is big flaw in 5e how it is basically impossible to suffer ailments that would not just be fixed by a good night's sleep. So lasting injuries and such certainly feels like an excellent idea to me. It also gives us another non-death defeat condition, which would be very welcome. Doesn't necessarily mean they could never be fixed, this being a magical world and all, but they should remain for a good while so that they actually have an impact.
I think a big issue with modern D&D (and apparently Pathfinder) is that how there really is very little mechanical consequences. Everything is so baby-proofed and there just is no feeling of danger and peril. Like whilst how the saves worked in the playtest might have had issues, the "ghoul surprise" as an even sounded pretty fine to me. They should be terrifying, and you should have to play smart and try avoid going to melee with them. Like I don't want to necessarily bring back level drain and frequent save or die, but the monsters could have a bit more teeth.