OK, who let the devs have access to the comedy box?
I will agree that the factions are a limitation, but then we still have Ming being limited in a way no other nation is, just because it is Ming. For example, Ming is the only nation that cannot build above forcelimits if it becomes necessary. At the same time, they suffer from having that force limit drastically reduced if the governing faction changes, which will then often massively damage the income/expenditure balance.
If there were a way that factions could come to affect any nation (probably different ones depending on situation and nation), or there were a way for Ming to lose the factions then they would be more sensible. Even if there were a way to limit the effect of the factions, or get to a position to reduce the limitations they place on you it would be good.
Separate, yet linked thought:
If somehow Manchu inherit Ming, then if I have it correctly, both factions and Celestial Empire disappear from the map?