Originally Posted by zz 
What is missing is the fact that due to allowing you to use any skills you want at any time by simply changing them, you never have any need or desire to play the same class more than once (or once in normal and once in hardcore).
This hurts replay value and how long the game will last for you.
This is true. You now 'only' have 5 play throughs for the different character classes (counting running through the difficulty levels as a single play). For a £20 game that's very generous.