While i do love how thirst, hypo and hyperthermia providing more survival risk other than hunger, i would like to have the option to make it leave me at half a heart at lower difficulties just like hunger does.
I feel this would still punish those who suffer from thirst and/or hypothermia/hyperthermia while also making the mechanic a little bit less punishing depending on the difficulty.
So i would like to see the health depletion work like this (vanilla hunger mechanic):
"On Easy difficulty, the player's health stops dropping at 10, on Normal it stops at 1, and on Hard it keeps draining." - Taken from the wiki.
On peaceful the health depletion would of course be not present.
I think this will make the mechanics a bit more interesting for a broader audience as well.

Just noticed Thirst actually works the same way as Hunger for health depletion. But then my issue still stands for hypo & hyperthermia.

I quickly added the things to 1.11 (see Pull Request #301 ).
EDIT: Did it for 1.12 as well (see Pull Request #302 ).