The unreal engine has nothing to do with my chief gripes about the game - the fact that they've pulled out almost everything that made Deux Ex 1 enjoyable. It's a completely different game. There's not 1/10th the depth of the original game.

Everyone has a vision of what a sequel should be. Usually when your public enjoys a game so much that it sells a huge amount and is even voted "Game of the Year" by PC Gamer, you don't rip it's lungs out and replace it with something completely different.

It's like id following up Doom with Pro Tour Bowling.