I saw most of his games for us and he was as skilled on the ball as he was hard off it. Bob Booker told me that the first time they saw him in training they realised he was easily the best player in the entire squad.
It's semantics but we've not really used a 4-3-3 even during Frank's later seasons. 4-2-3-1 (or any other nominal formation) doesn't mean you stick to it religiously and, certainly, one of the holding pair can roam forward knowing one will stay...