I don't see that that has any relevance to who fills the 6 and 8 spots when there is an option at 7, as Pete Samu is. But to answer you, I would honestly have to say Rob Leota at 7 as he is the best pilferer of the three. That would not make me change my mind about Harry being best suited to 6 and Rob V staying at 8. I just see no justification at asll to swap them.
Actually, I don't understand what point you are making about Wilson/Samu being a more complementary fit on the openside. Do you think there was an issue between Valetini and Samu covering the open side last week? In any case, why would you think Wilson and Samu would operate better? At least Valetini and Samu have tremendous experience playing together at both the Brumbies and Wallabies. I don't think Harry Wilson and Pete Samu have more than a nodding acquaintance with each other speaking in rugby terms.