Recalling his post match interviews as captain for England.. he doesn't strike me as the sharpest tool in the box nor somebody that that would naturally suit the DoR role.
I'd say that's somewhat harsh on the guy.
I remember reports of him being meticulous in preparation, and a real expert in set piece play.
I was never a huge fan of him playing for England as I was always after bigger, heavier locks.
He was often a scapegoat for a poor team at the time, but both Saracens and England have since seen a lot in him