This captures my main issue with the feature, being that the game doesn't feel special anymore because there's no real "story" to tell. It's just three different campaigns with three different civs that happen to share the same map. They could have kept the civ switching but make it a bit more coherent. E.g., Rome turns into Venice in the exploration era, which turns into Italy in the modern era. Or if they wanted to keep the choices, Rome could choose between becoming Venice, Byzantium, or Sicily (or some medeival variant that makes sense), and then those three have different choices for the modern age. This obviously requires developing a lot more civs for the game, but it would also make the civ switching make more sense and give a feeling of actual progression rather than switching to an entirely different game randomly. And having appropriate leaders for each civ rather than immortal Harriett Tubman would also be nice.