IMO it's already better than Civ IV because Civ IV is not that much fun. Sorry, I realize that's blasphemy on these boards. But as someone who likes to dig through XML and make small adjustments to suit my gameplay Civ V and VI offer far more systems and hooks than IV did. I can play V and VI. IV I have to turn off after a couple of minutes because it's dull. The AI is more competent in the sense that it can reliably walk to and touch your city with a stack of units, which can cause a loss, but that's not saying much.