The core of this DLC is playing a nomadic horde, which is also the main problem. If you don't want to be the next genghis khan then this DLC is almost pointless to you.
Do notice that without this DLC there are no nomadic tribes in the game to play against.
Playing as a nomadic is good but a tad to easy when compared to the base christian counrties.
IMO worth buying if you want to play as a horde, but useless for anyone else.