Science or Fiction. Maybe this point has been made before and apologies if so, but does the fact that the last rogue to make a choice have an unfair advantage in that they will have heard the reasoning/choices of the rogues before them? Does the order make any difference at all (I'm sure someone will have done the stats on this).
A couple of suggestions.
1) Guests who take part in Science or Fiction should go last, as it would be unfair to ask them to go first if going first is a disadvantage.
2) Organise the Science or Fiction segment so that the rogues all hear the initial descriptions and choices, and then everyone is faded out. The first rogue enters, makes a choice, then the second and so on, and once the rogue has made their choice they can stay 'in'.
If they did this for, say, a year, this second way of playing Science or Fiction might be an interesting comparison to previous years - how much 'groupthink' is involved in the rogues choices? If each rogue doesn't know what choice the previous rogue has made, is there likely to be less 'clumping' in their choices (i.e. less occasions when all the rogues agree)?