Haven't bought it. I'm torn. I like a lot, the vast majority of what I've seen as changes. But.
I love the age system as a concept (and leaders detached from civs, and the leader selection is good), but it requires a *much* larger and much more diverse civ selection to realize its potential, and right now, not only does it not have that, but there are some very concerning signs that the Devs intend to waste design space on adding another age where half the civs would just be repeat of already-existing Modern civs (eg, Prussia/Germany, Russia/USSR, Ggreat Britain/UK, French Empire/France, and the worst offender of all, America/USA).