They keep the balance of comedy and intensity. I think season one handled it amazingly by only having the suspenseful moments be with episodes that had a De Vil in them, while leaving the rest to comedic slice of life sorts, and I want it to stay like that. I think it's the best balance the show could have.
Dante becomes more of a character rather than a stupid screaming megaphone. Dante's Inferno and The Curse of the Ferrydog made me want little moe than for Dante to become an actual character in season two, and I hope that becomes the case.
There are more songs. The songs we got in season one were awesome, but they were fairly limited. I hope season two gives us more in season two.
Dolly stays awesome. This should go without saying, but Dolly was my favorite part of the season, only comparable to Hunter's redemption. Season two will give her just as strong of a perforamance, I just know it.
We get at least one episode with Hunter in it. It hink Hunter's role as a main character ended the best way it could, but since he's a good guy now, I'd like to see him interact with the pups some more. That dog communication skill of his could also come in handy later down the line, and I'd like to see how it's utilized.