Jeff Wilson believes Dave Rennie's decision to trial Tupou Vaa'i at blindside flanker is a deliberate Springbok-specific strategy — building a bigger-bodied loose trio for the Test series in South Africa later this year. Wilson wants to see it developed further, including a return to the 6-2 bench split Foster once deployed against the Boks at Twickenham. The counter-argument comes from Justin Marshall, who thinks Vaa'i is too valuable at lock to move, and who has a broader concern about the back row: Savea hasn't taken a single carry off the back of a scrum in either Test under Rennie, which Marshall sees as a critical deficiency against Springbok defence. His preferred loose trio — Sititi at 8, Lakai and Savea at flank — sacrifices lineout size but gives the All Blacks the carrying threat Marshall wants. The piece essentially maps a genuine selection debate that Rennie will have to resolve before the tour, with the Boks' physicality as the central variable.