It's worse. It isn't entirely un-fun, but it doesn't even try to put up a fight, so don't expect any meaningful interaction with the AI players. You ignore them until you have to wipe them out. I'm a terribly Civ V player by the standards of this board (< 50% win rate at King), and I've only lost one BE game so far, by two turns, because I missed a notification telling me Kavitha was going for a victory herself.
I don't understand the attitude, very common around here, that this game should only be compared with "vanilla" Civ V. Why? If you have a choice between buying one or the other, the only sensible option is to buy Civ V. If you want to talk about patches and fixes, wait five years before buying Civ:BE.
I have a policy against pre-ordering games. I bought Civ:BE because I had a day off the day it was coming out and nothing to do. I figured, worst case was I'd waste $50. I feel that's basically what happened. I should have installed something else and waited five years.