It's not like a reliable source of admins is a buff - it's a liability. In large galaxies, you can't do without, and the entire purpose of Citizens is wasted when players are forced only to use one type.
I suppose that once the colonization phase is over, you can afford to select another type of ciizen, but by that time the game is decided, and whether there are admins or citizens or anything else at best decides what is the fastest way to wrap up or lose the game.
If Synthetics and Silicon races are overpowered, why attack and effectively destroy a core mechanic, rather than the actual cause?