Potential unfulfilled. The final battle's beyond boring and the sudden ending is beyond lame.
Having now played the game 3 times, my original disappointment stands, and is even stronger after trying to find some strong points to offset the overall mediocrity of the gameplay.
The conclusion is visually stunning, yet the cutscene ends suddenly and goes to the credits, when just a bit more effort to show what happens after the arcs come out of the ground (perhaps people slowly coming out, shielding their eyes from the bright sun) would have given this a more complete feel to it. As is, the game just feels like it was rushed at the end, with a lot left to fall by the wayside...