Overall, I find it a fun game. All I can think about is that a person not liking this game can be that slow. Many buildings and armies cannot be built unless gold or crystal is stored. This can disrupt the gameplay which may upset some players.
Still, most players interested in this national game probably expect this slow pace. So it's not really an error in the design of the game. I would recommend it for any patient player who likes competitive real-time strategy games.