I'm torn from what i've seen. I like the aesthetic, and some of the systems look very clever and even fun, but it doesn't look like it has the charm or simple addictive loop of civ4.
That game just felt so cozy starting in the stone age, and the mechanicsmight not be balanced but it's so fun.
I'll definitely give 7 a good chance though as i basically didn't play 6 at all.