What it does, it does quite well, adding 17 new scenarios and over 250 new elements to the game. Unfortunately, that's all that gamers can expect in this expansion, there are no tweaks, adjustments, or fixes to the game at all.
The game has not changed in any significant way and has no new gameplay. All of the additions made to the game are purely visual that I could see. So what we have is a game that's still the same as it was at the time of its release four years ago.