I agree, Barbados Slim isn't funny and his constant reappearances are beyond tired. If you ask me, he never should've been seen beyond his first appearance in "Bend Her". For that matter, I wish the show's writers would retire Santa-Bot as well; his shtick hasn't been funny or necessary since "A Tale of Two Santas".
As for this episode, once again I'm in agreement with Darth; I'm still a big fan of Futurama and I usually try to defend the show whenever possible, but this installment was just weak. Concluding every single segment with a "the crew and/or the Earth is screwed" ending just smacked of lazy writing to me.
Why should that be appreciated? Continuity nods aren't a substitute for funny jokes and clever writing. Frankly, I couldn't care less about continuity nods if the jokes attached to them aren't funny, or even worse, if there's no joke at all, just a "look, we're mentioning this thing again!" reference. References aren't jokes and shouldn't be used as a substitute for jokes. I don't appreciate forced "humor" which relies solely on familiarity and nothing else. It's a cheap shortcut to a laugh and again it's unforgivably lazy. If I have to choose between continuity nods and well-written, funny jokes, I'll take the jokes.