was not a fan of the gameplay modification they made in the remake, but with the addition of the fan made mod "The Authentic Colonization" it's much close to the original.
There is a link between these games that means a faithful update isn't possible. Both involve slavery. In both, the player can actively trade human lives, including the capture of slaves. Even in Colonization, where such depiction may be historically accurate, it is just too sensitive an area.
https://en.wikipedia.org/wiki/Civilization_IV:_Colonization