I'd argue there is barely a 6 in the game that's best weapon is running, that would be able to do anything behind our pack the way they are getting beaten atm.
That running sideways you speak of is because he has to run or pass off the back of a painfully slow play the ball, with opposition in his face with great line speed every time he gets the ball in those positions.
Defensive side of his game needs work, his front ons can be okay, but reads between him and Shiba are dreadful.
Until we sort out whatever is happening in the ruck, Duffy/Rogers/Hunt at 6 isn't going to change much. IMO at least.