I have to disagree with the OP this system is going to bring a lot of new thinking to the game managing cooldown is something we already do in this game so I don't see the difference with auto-attack and no stamina. Besides that other people have commented on tanking but, it doesn't just end there there are loads of skills in game that could use to their advantage (not jarring strike or any of those since they don't have stamina cost i never saw any reason to complain i manage that just fine) raging strike is no stamina it's one of the biggest reason its so highly valued.

Also I don't think ive ever just stood in combat stance in front of a mob waiting for my stamina to regain to full your wasting time.