To be honest, the tactic of playing the wood at 8 didn't do too badly against the All Blacks and Scotland; he certainly had better control at the back of the scrum than Haskell. I think it comes down to having our best three back-rowers on which, now Morgan is injured and Haskell had a good game, is Haskell, Robshaw, and Wood.
For the bench spot I wouldn't mind seeing Fraser given a go, he had a decent time in the Saxons. Just about the only English loose-forward doing any break-down work. I don't think Lancaster would be feeling bold enough for such a big game to put either him or Vunipola on the bench, though. No idea about Kvesic, haven't really see him that much.