Good Lord...go over to the DLC thread and read Johan, Dark, and Captain's comments about this. They are graphical additions that were never budgeted in for the game development that they figured, later on, would be a great DLC for players so they asked an artist to do it for them. This was outside of the game budget, so you can't just lump it in. the DLC cost is meant to recoup that development time and cost.
I figured that much, yet 'graphical options' should be in the game anyway. IF you can add stuff during the development time, why not include it in the game for free? When I read the thread about future preorder gifts I expected a bit more than lousy DLC. Where is the point in pre-ordering when you receive the same stuff in a late complete pack on steam anyway? Other than that, I'm waiting for the pre-order to appear on Steam. It's a bit impractical to have DLC on GG.