It was one game and then not a huge margin in it, so yes I have to say that racially changing game plans and personal is not required at this stage.
In fact having a lose is not all bad as it gets players to refocus and play harder.
England have much to fear in All Blacks
Sonny Bill Williams has become like a solar eclipse ahead of the All Blacks' grand slam opener And by the time New Zealanders wake to watch his test debut tomorrow his immense frame will be casting its shadow over Twickenham. Ref. Source 3
Has a 2nd five yes he has claims to be in the team but as a centre not at all, his style of play is to similar to the current 2nd 5/8 we have there.
Smith is a much better centre and I would rather see Williams given his 1st All Black cap between him and Carter.
I disagree with them appealing it, at times you just have to suffer if others think you did wrong.
I don't think it was an intentional headbutt but it did happen so if the penalty is a 4 week stand down then you have to take the medicine.