Stepping back when moving to shomen posture
One of the students in my weapons class is a longtime student of several ancient ryu's. He notes that in Saito's kumitachi, one always leaves the right foot forward when raising the bokken to a shomen position, whereas in other styles one draws the right foot back behind the left foot as the bokken goes up. He maintains that the latter version leaves more options for movement, and just doesn't get why Saito (and therefore O Sensei) chooses to leave that right foot forward.
I have tried both ways, but not enough to come to any conclusions. Does anyone have any perspective on the two approaches?