Since the series finale of Season 5 aired. Have most people accepted the fact Chuck is God now? Its been confirmed already by Collins, Kripke and Benedict sometime last year.
Kripke has stated the reason why Chuck/God hasn't appeared again since it is because its hard to make a storyline for his return (Probably doesn't want it too cliche)
I'd like to hope before they end Supernatural Gods absence from Heaven is addressed and perhaps Castiel somewhere along the lines meets his father as Im sure he has alot of questions for him.