Some people on these forums have expressed that they think both the food and stamina systems in .63 are too punishing at the moment. I could not agree less with this. From the beginning, DayZ has always been a survival game. It was always meant to be hard to survive, which I think some of you have forgotten, with the prevalence of infinite apples spoiling you. Survival is a part of the game again. It was always supposed to be part of the game. If you are never burdened by your thirst or your hunger, there is no point. If you don't need to plan out what supplies to bring on a long journey, there is no point. If nothing bad ever happens to you for failing to manage your character's status, there is no point.
Sprinting rapidly reduces thirst and food now. It is not something you can always afford to do anymore, and this makes sense. It is not realistic to sprint at your maximum capacity all the time. No one travels long distances like that. We need to get accustomed to walking. I made it all the way to the airfield on a single can of beans because I wasn't sprinting. Managing your character's health is essential, and beating the crap out of him/her all the time will put you in an early grave. This is exactly the way it should be in my opinion.
Some of you may think that journeys are painfully long without sprinting. This was not my experience. It was actually fun. The world is vibrant now. The ambient noise and weather changes are fantastic. The day night cycle also transitions faster. There is much more to look out for on the trip. Obviously you need to manage your status as well, which is a distraction from the duration of journeys too. Things actually happen now on your way to get where you are going. The world isn't static, and neither is your character. I'm content if I'm healthy no matter what I'm doing.
edit: I am referring to basic movement with the w key, not walking by holding w and control.