That's about the going rate at Supanova for some of the celebs :-) Not my cup of tea, but each to their own.
As to Gabriel. Well, He's just super awesome! I read a comment off reddit that basically said, yeah Lucifer and Michael are way more powerful but Gabriel is way smarter, which I tend to agree with :-) That said, he did have burned angel wings in Hammer Of The Gods too, when Lucifer "killed" him, so I guess there's still hope! :-) I would absolutely love it if Gabriel pulled off another shenanigan. I know it might seem like too many times but he's lived in that trickster mindset for so long that it would be second nature to him. So I'm hoping against hope that he'll be back again :-)
Although I'm still hoping the real Death will come back - the new one works ok but oh my fucking Chuck, Julian Richings was the most inspired casting EVER. You can't beat that shit! So I'm mildly delusional sometimes when it comes to Supernatural :-)
Sam and Dean, though, they were passing the idiot ball back and forth this episode. Actually, they all were with regards to Jack (it should have been easy to out-manipulate Jack and beat Lucifer at his own game at the same time but oh no, Team FreeWill were too busy yelling and being unreasonable and making themselves look like the bad guys). BUT as to the rift problem. They should have ensured Gabriel got back through the rift because they need Archangel grace to power up another portal and Gabe is waaay more trustworthy than Lucifer! They promised the AU humans they'd help them regroup and return. So ensuring at least one of the Archangels was through the rift so they can open it again should have been Priority #1.5. Not "let him stay behind and fight to buy time against a far more powerful angel and probably die."
That was dumb.
Leaving Lucifer behind could have been an ok move if there wasn't a worse angel left behind for him to team up with. I can only assume Sam thought Michael would kill Lucifer, thereby solving their own problem for them. Yeah, because things work out that easily in the Supernatural universe.
I guess it's kind of refreshing to see characters do stupid things and make decisions in the heat of the moment that turn out to be dumb instead of working out well? They kinda had a plan, then when it started to fray, it's like they just lost their shit and started improvising everywhere.
Sam and Dean basically ruin everything they touch, anyway; they are really not nice guys :-D They're not even really The good guys. At this point, the Son of freaking Lucifer is a nicer guy than they are. They used to be all about the saving people, hunting things, now they're just hunt that shit down and if we happen to save someone in the process, great, but if not, they shouldn't have gotten in our way.
So after all that, I guess that's a yes, I'm still watching :-D