this feels 'by design'. in real life, you don't generally have any way to know your current energy/hydration level once you eat/drink enough to go above the hungry/thirsty thresholds. you only know when you've eaten/drank too much and feel full. real life has no 'green status', so i don't see a need for it in dayz either. just eat and drink until you feel full (the stomach icon appears), like real life, and you can be fairly sure you're at a healthy level =)