I would like to see this feature as major addition. Player should be given the ability to apoint individuals, each with different perks like bonuses to industry output, immigration, tax and adm efficiency. It would also be nice if the quality of those polititians should reflect things like let's say consciousness, plurality or literacy etc.
This would be by far my most preferred addition to the game. It doesn't need to be a ludicrously deep system, but a measure of differentiation between different leaders and cabinets etc, somewhat akin to the HoI system but perhaps with more dynamism (e.g. national leaders work similarly to generals in VII in that they have randomized attributes (And objectives/ambitions?) rather than preset stuff like "Man of the people") would be truly, truly awesome to see at some point.