I love the idea of this

in fact.... well, you'll see
anyway, i have a suggestion for a new type of government-
Imperial Republic
basically, a few days ago, I was thinking about if the Roman EMpire had survived, what it might have, government wise, evolved into- this is basically the result
The imperial republic, a quasi-democratic form of government elects magistrates on the local leval, and in that respect has full democracy, inlcudong up to the plaetary, and system wide scale(I think that would be approprite for the mod), however, this is where democratic thought get foldeded into that of republic, and then empire
these magistates, governors and the like then form a council overseeing a province, and elect one provincial govenor to act as the head of the province, in addition, a senator is choosen, as well as a tribune of the people (thus representing a three teird government, executive,legislative,and judicial branches, mind you that the function of tribues, and senators would have changed in function somwaht by this time in the idea)
the Tribune is basically a high judge, along with a panel of lesser tribunes, acting somwaht in the form ofg a supreme court, though the Emperor ofcourse keeps the righ tto overturn the choices of the court, if ratified by the senate
that said, the way an emperor is put onto the throne is not for terms, but is indeed for life, unless there is wide branching majority to dethrone him, or untill the emperor abdicates the throne- the emperor is ratified in most cases by an agreement of the military (the centurate council), and the senate on a candidate, the ratiying of the candidcy by the the judicial branch
the emperor has extreme power, but is limited by Imperial law, that which offers a great deal of personal liberty, including allowing local provinces to have subset laws, though the emperor dose not have to obey those laws if in the province, as he is governend by Imperial law alone
economy wise,a great deal is over seen by the government, lest the wealthy buissness be in such a position to try to prop itself up into a rebelling government of systems, and in many ways, the economic policy could be seen socialistic free market economy