Man, I remember abandoning this manga when Lou was invited. I didn't want a walking dead situation when your favorite character gets killed and the manga (comic in that case) goes downhill really fast.
I'm glad I decided to reread this manga once again.
The anxiety of not knowing how things are going to play out is great. There are so many loose canons at the moment (like Thomas is free right now, the elder from the 3rd floor and Anthony) you have no idea how things are going to play out.
I just hope Lou is allright, because I can see this arc ending with a higher death toll and it would be sad to find that Lou was dead since long before this arc started.