I don't disagree, I think he should be at 5 - I've stated that in here.
He shouldn't be at 4 yet, though. Maybe one day; but moving Smith out of 4 for Green is a ludicrous suggestion. One day he might be the ideal 3 or 4. But right now, absolutely not.
Again, though, I'd be ok with him at 5 now. I think he's a more natural no.5 than Head who I think is an ideal no.6.
I didn't say they should move Smith out of 4 and move Green there. I just said Green would be better suited to that position in the long term.
And I agree about Head. He is the perfect number 6.