I didn't want Jo to die. She was hot
and I was hoping she'd end up with Dean. I'm kind of glad for a break because I got all these movies and shows that I haven't watched that I need to catch up with.
As for the Colt, I think you can add the Angel of Death to that list. Everyone was thinking the Colt would kill Lucifer but I always had in my mind that the Colt is just a gun no matter how magical it is how could it defeat Lucifer? There's Lucifer being limited by his vessel but it seems that he's still powerful enough to overcome the Colt. Then what if the Colt can kill any demon but Lucifer isn't actually a demon? He's a fallen angel. So what if we can classify Lucifer under Angels along with Michael and Cas? With this logic it'll be 1. God 2. Angels 3. xxx 4. xxx 5. xxx
Finding out the colt is useless against Lucifer, the Angel of Death is coming, Jo and Ellen dying makes the title of the episode really fitting though. I think Gabriel will have a part to play.