The Eye of the Shitstorm
I liked this episode for 4 things:
1. They decided to tone down the fanservice a bit, which means it's actually a bit more in line with the manga. Okay maybe not so much, but they cut down on a lot of the obvious fanservice scenes and integrated them more with the actual scenes to make them less distracting and obstructive. Except Shizuka for obvious reasons. Not like I liked her character anyway.
2. Saeko is made of win and awesome.
3. Meganekko Saya.
4. Most importantly is that this is a bit of a cooldown episode to the chaotic pace of the first one. It really gives the characters a chance to calm down and sort it out, considering Saya's eventual breakdown after having to take out her first Zombie. It helps to put the severity of the event into perspective, not only for the characters, but for the viewers too.