Royalist blocks were definitely a significant balancing element. The number of vigs may be too, in a way, but coupling them with opposing blocks was a good decision.

For my early suggestion in the Committee, removing most night powers from the factions would keep the lynches hot but would remove much of the sting from factional dynamics, which you might not desire.

For Committee powers, just to increase choice and variability I still recommend that the 5th member come with some extra power, but exclusive to the vig during the deployment. For example, at 5 members you could use a track and a vig, or a track and a jail/protect/block/etc.