Well, I was just trying to explain what I think some players might feel.
But I do think that there is a line that some players would feel should not be crossed. Basically, there is a break in immersion that players accept and a break in immersion that players would not accept. For example, we all accept leaders that live 6000 years, units that can shoot arrows 500 miles, Roosevelt declaring war against Cleopatra. But I think a lot of players would have a problem if say the game added orc and wizard units to the ancient era. We accept historical leaders and units put into what-if scenarios because that is what civ is about but a lot of players, I think, would take issue with adding completely non-historical units or leaders into the game. And, I know some players feel that a GDR is a non-historical unit.