I didn't give it much thought until recently, but I think survivalist might work to the ranger's detriment in one aspect: "You are too full to eat." Earlier today, I think a real life hour passed in between a healing sleep and my attempt to eat... and I was too full. (I don't think I'm exaggerating although I admit I'm going on my observation and not by a stopwatch.)

There are some times when you want to be able to eat something.

Am I correct in my observation? Would it be possible to tweak the time in between full and slightly hungry to allow rangers to eat those pills et al more often?