Yes, 1-2-1-2. But since so many powers rely on moving around (Deft Strike) or moving the target (Positioning Strike), those powers could end up a little nerfed. I could also house rule that if you end your movement in the "middle" of a diagonal square you can complete your movement on that square, so if you use Positioning Strike to slide the target 2 squares diagonally, the target can still moves 2 squares, and if you slide the target 3 squares diagonally, he only move 2 squares.
House rule it won't be as simple as we thought initially, and we really need to see the full rules before anything.