^^^^^^^^^ interesting idea but can't see it 'cos (a) Kahui had previously played a fair bit of wing whereas Fekitoa has to my knowledge played none & (b) that being the case it's something they might give a crack on an EOYT (as with the Ben Smith at 13 experiment) but surely not a RWC, we're not 'straya y'know
I think we can broadly agree that at this point the deadset backline certs are ASmith, TJP, Cruden, Carter, CSmith, Nonu, SBW, Savea & BSmith plus 1 HB & room for 3 of a large group that includes Beaugan, Slade, Fekitoa, Jane & Dagg of the current/ recent AB;Osborne, Lowe & (long shot) Proctor of the potential future AB; & Piutau the joker in the pack, his selection or non-selection possibly resulting in several players making or missing the squad.
By comparison picking the grunters & grafters is gonna be easy peasy................
On your attempted correction of @Dismal, have you ever been strolling along & seen something that could be either a harmless piece of wood or a deadly-as-fuck King Brown & decided to poke it with a stick to find out which? I always assume it's a King Brown.............