One year they had a post finale red button episode up in the Clauditorium with a quick debrief with the finalists and Zoe (I think it was Zoe?). It was quite nice but they never did it again, I'm guessing no one watched it, or maybe the programme makers and participants just wanted to get on with the wrap up/head down the pub.
I'm guessing in Bill Bailey's year they couldn't go out to a bar afterwards so that probably added to the sense of anticlimax.