Behavior of mobs, Sounds effect, etc.

As a player I pay more attention to the experience of playing this game. I am no satisfied with these three problem. First, the skeleton can shoot me when it's facing me, but actually it is aiming at another place. It is not real and it do make me very uncomfortable. Second, the sound effect need to be improved. Last but not the least, some blocks(like beds) will 'disappear '(Picture).