Honestly, the game gets unhistorical by 200 B.C. so I figure the game should just be cut to 27 B.C. and the imperial reforms and units removed. Its dissapointing to hear that some units could not be added due to unit limit and here is the "imperial units" which were only historically used for the last 31 years of the game. So basically, make the end 27 B.C. get rid of the imperial units and i am sure everyone will enjoy the units that fill those spots, whatever faction they may be.

Also, for the imperiator trait, could that be part of the victory requirements? Like "have all these settlements, and a faction leader with imperiator"?