I quite enjoyed it. I'd rank it in my top five episodes this season. I thought everyone gave it their all with their performances and Jane Lynch never fails to impress. I didn't miss NYC for once and thought the directing was top notch also. This was the first episode the newbies seemed truly interesting to me and the first time I could see myself enjoying a show focused on just them. Not that I want that of course.
I am enjoying Ryder's catfishing story-line and have no idea who it could be. I look forward to finding out in the season finale. The first third of the episode being so "uneventful" really helped convey how random a huge event can be.
It doesn't matter that it wasn't an actual shooting and I don't consider it a ploy to grab ratings since it wasn't even mentioned in ANY of the promos aired for the show. It was refreshing to see a "shooting" from the viewpoint of the victims and how the event (real or not) has a huge impact on their lives.