I have to agree with everything OP writes here.
So many good games is ruined by bad controls/camera movement. (many games do get fixed with patches though!)
If the controls in Dungeon Siege 3 is not made better for pc players, then that is the reason I will not buy and play this game.
Trying to control camera rotation with the keyboard was a nightmare. When the player run up on the screen the camera rotates one direction, but if you run downward on screen the camera starts rotating the other way.
Now that is one nice way to make any game confusing and annoying to play.
The demo was very nice in most other ways. Looks like a fun game!