Okay so I just watched that episode and all I have to say is what!?
I'm bummed rigleen only lasted for two episodes, but I get the feeling that it's gonna come back. I think what happened was JG wanted to take a break from the shipping because he knows that he totally made a mess of it. He knows he made it about the ships and he wants it to go back to the old days for a while, which I understand. I was getting sick of the love drama anyways.
Adventure time, from what I can tell, went downhill since they made it about Finn's love life drama, and JG didn't wanna do the same to RS. So that's why he ended the two ships the way he did.
Anyways, getting back to the episode. In theory, an island like that whole be cool, but the truth of the matter is it's a mess and gross. I think it should be renamed Hangover Island. But I think because of the TV-PG rating, they couldn't do it. But the guys there reminded me of a bunch of newly dumped frat boys who got wasted and then woke up on an island. I wonder what Tom Leykis would think of it.
Now I have to wonder what kind of episodes they're gonna come up with. Who knows? Based on the tiny cameo that Thomas/Nikolai made in Dumped at the Altar, maybe it'll be about his return and the usual shenanigans with Mordecai and Rigby. All we can do is wait.