Agreed that zombies falling through the ceiling like that didn't quite make sense, unless the first hole somehow weakened the entire structure. And then each additional hole made it progressively weaker. Maybe.
I'll let most of the "go off on your own" stuff go, since this genre has always depended on characters doing stupid things. And when this has been your life for 3(?) years I could see becoming a little complacent (music in headphones, open cell doors, etc).
I thought it was interesting that Daryl is bringing people back to the prison. Also kinda liked Beth being so unaffected by that kid's death.
Was Tyreese this squeamish in the comics? Good to see he's getting with Karen though.