Would you like to respond to the suggestion I proposed to Chiyo to improve the UX around this?
Also yes. They definitely need to dress it up. But it still feels janky. Game won't feel fluid until there's enough options to pad absolutely everything.
But I figured another issue, is that once they have enough Civs, you'll start facing choice paralysis, and you'll be unlocking like 12 Civs at once, which will feel equally tacky.
Don't forget most of those Civs will be DLC, so you'll have to basically buy your way into the game making sense / feeling good. Or buy the collection in 5 years.
Unfortunately, and ignoring my personal opinion about Civ switching, I don't see a feasible way forward for it, except to make it somehow optional for players. I'll explain why.
Most people think (or thought) about Civ like some kind of alternate history. So when you play England it's as if you're playing the story of England, if England was somewhere else and had different circumstances, and you could control the development of that Nation in your own specific way.
So the control over how you lead it is the crucial aspect that people enjoy, they play as the Supreme Leader, and have to face adversity and enemies in a story taking their country to the top.
Once you introduce this new layer, there's some inherent dissonance. On paper it makes sense - you switch with the Ages and follow a path that occured in real life - Romans, Normans, English.
But the circumstances are not the same, so it doesn't make sense. Some Civs don't have successors, so you have to make a leap of logic. Some Civs don't have predecessors.
At this point, the story starts to lose shape, and it's more like you are switching character in a video game, rather than a natural progression.
If every Civ had a genuine successor and predecessor, then switching Civ would be a foregone conclusion. But there isn't and never will be, so it's not.