So I am still in season 3 but I can say that I view this in a similar light to many here. Not only do the characters grow with the original fan base but the maturation of the series will draw more neigh-sayers in to enjoy the show. (sorry, the pun was too fun/easy or feasy?) Any how the show growing is not an issue and honestly, it makes the occasional slapstick have more punch. What I think is happening now is that the show is likely in that odd place of growth where its sort of like a teenager meaning making fun of people/characters right now would be out of place but as it settles it will have room for both mature and well-developed characters and the occasional prat fall.