I completely agree with you. I had hoped for a system which just rewarded you xp for how long you stayed alive and then you could allocate points into whatever area you wanted. This sort of approach would remove "grinding" because you just gain xp for staying alive - not for performing specific actions. People could say you could abuse this sort of time-based xp system, but the game doesn't let you just "sit around". You have to eat, drink, maintain your temperature, stay dry, warm, etc - so you can't just sit around and earn xp. In my book if your character has managed to stay alive for 200 hours - by gosh they've earned the xp.
Sigh- very disappointed as well with the system they announced.