Much like Walton Goggins stole the show in Vice Principals, I have a feeling that the sister, played by Edi Patterson will shine in the series. She's already my favorite character. And for some reason I find her very attractive (I think it was because she played such a nut in Vice Principals, haha).
I think Danny McBride's strength is in the casting for his shows. He always plays basically the same guy, but the characters and actors around him make the shows great. And obviously the writing for those characters is great.