I'm glad you're enjoying it. I'm working on fine tuning stealth and archery on the current update as it introduces skill levels that affect how far your arrow flies before falloff begins and how quiet you are when crouched.
Currently, if you are crouched, you can get closer to the antelope before it hears you, but if it sees you, it doesn't matter if you're crouched and it can see you from a much further distance than it can hear you.