I wonder if things would have been better off had the National Assembly stayed at Versailles. True, they would be in less immediate control of Paris and he who loses Paris loses France. But, in Paris, to control Paris, they let it control them, so perhaps some physical distance between themselves and the angery sans-culottes would have been a healthy thing?
It's hard to govern rationally when you know radicals, enemies, etc are beating on the door demanding that you listen to them or there'll be an insurrection. When the sense of imediate physical danger is that real, decisions are bound to be more motivated by panic and fear of things falling apart than rationality. Had the deputies not felt so imediately threatened by the crowds gathering outside, would they have expelled the Girondins? Would a lot have happened?