For me, the 1.7.2 is only playable at night time. 1. Zombies have currently more than super senses. This must be fixed. They can see you, while you cant see them. Thats not realistic and so not fun. 2. If you cleared an area, the area should be clean for at least 10 minutes. That there are spawning endless new zombies in short time doesn't feel realistic... so you won't be rewarded for doing a good job by cleaning an area. 3. If you keep this extremly good seeing zombies, let them spawn much less. Maybe 1/3 of current count. 4. I feel that spawn to much zombies in villages or some solitary houses. Edit: Zombies senses are fine at night. Sometimes there is too much "visual" for obviously no reason but that's okay.