I think the game has pretty good level design but with blink many of the shortcuts and alternate paths they put in the levels are completely useless imo. This game could play better as a stealth game if you couldn't blink all over the level this easily and if mana potions weren't everywhere, I'm playing on Hard though, I should have gone for Very Hard I guess , it's too easy I feel now. Most of the powers are pretty useless and only good for mixing thing up for fun, I wonder if you can beat the game without using any of the powers even once?
Then there is the AI, it's very blind, I think when you lean you become invisible to the AI ? the other thing is door that goes to separate area with a loading, if you alert guards on one side, the other side won't be alerted, and you can go there and back to avoid the enemies.