I have taken to always make sure I have the rested buff it helps a lot it's only when its cold and raining is stamina then returned to normal regen as if it was day time. I do wish there was a skill for overall stamina and health. The immediate draining on the max hp kind of sucks and wish it only did so when food started flashing and it seems food flashes at like 50% so I wish that would only flash at like 30%. Could take a page from tarkov in how max stamina and stamina drain is effected by endurance which you level by running/moving so maybe the running skill could effect stamina drain and say running speed aswell.