Turn time seems to have improved but it still takes a long time to load. I guess some of that is modibility but, still, it would nice if they'd sped that up a bit.
Overall, really pleased so far. The game looks great, the new Civic/government stuff gives a lot of customization and depth. It seems hard to get enough production in cities, though; the Tribal Villages seem very random in how good they are. Getting an early game relic is huge.
My first game I got utterly stomped on King by failing to build enough armies and walls. The second game I played on Prince but after realising the value of walls I think I'd play on a higher setting next time. Cities are so much squishier compared to Civ V it's going to take some getting used to. And Barbarians are much more of a threat.