Fair points.
I agree with you in that he isn't a Cooper Cronk. That's a fairly big comparison to make. Cooper will end up going down as one of the greats. Throwing DCE in to replace him at origin level with bugger all notice was never going to make DCE shine. They aren't remotely on the same level in my opinion.
Saying DCE couldn't organise anything during the Walker experiment is a bit tough in my opinion. Every team knew he was the pivotal half... Walker (no offence to him cause I think he's a weapon) isn't a half. He's a ball runner. That's it. All the teams knew this and were able to rush DCE. This made his efforts look ordinary.
With DCE on one side and Lyon on the other - we looked so much better. Adding Green will again improve because he's a better ball player and in play kicker than Lyon.
My point is the Cullen (from what I've see) is more than capable of organising 1 side of the field like Green will do this year. Just my opinion.