Never got into Civ V so not particularly interested in G&K. Really liked the art direction for 5 but just never got into it. Played Civ 2, Civ 3, Civ 4 to death and picked up all Civ3 expansions.
After visiting civfanatics to get the rundown, I do like some of the features and I always liked religion even though it was generally more harmful than not. Not sure if the espionage changes will make it relevant as I've rarely played too many games where I needed to steal techs to advance as I was already too far out of balance. Anyway not quite enough to hook me. Perhaps if it shows up on steam sale by end of year but then again probably not.