[achierius]

I think it's very plausible, looking at the individual events of the revolution, that a different king could have averted what eventually came to pass -- certainly, it could have been possible to have a much more 'moderate' result adjudicated entirely within the Estates General, or even without calling it at all. That alone is enough to suggest that Louis XVI, while 'unremarkable' in and of himself, was historically quite relevant precisely in that he was unremarkable. A remarkable king could have resulted in a very different result and thus course to history overall.