I'm still very much enjoying the game, but I agree that he just went a bit too far with Act 3. Act 1 and 2 were filled with excellent gameplay sequences (especially Act 2). Those areas truly offered some of the best stealth action gameplay I've ever experienced. While still very different, I was reminded of Deus Ex or Thief in that the levels were still linear, but open ended enough that it actually feels as if you can do things very differently each time (I know it's quite possible after watching a friend tackle those same segments).
Act 3 wasn't necessarily bad at all, but the cutscene to gameplay ratio just went out the window. If they want to throw around such lengthy scenes, it should be reserved for the ending segments of the game. The scenes were fun to watch, but they really needed some trimming. I hate to say this, but one missed opportunity for gameplay occured near the end of Act 3 following a boss fight. You enter a place in a cutscene with the intention of making your way to another point and they simply filled that in with a cinematic when they should have allowed you to move through the area yourself.
In a way, it reminds me of what happened with Crysis once you reached the alien structure. The focus of the game completely shifted at that point and everything you did during the first half of the game is basically dropped in favor of a more cinematic experience.
