He is a fullback, all you blokes saying he isn't have missed how easily he gets turned inside out and taken under the ball. As a CHB or floating HB he would get mauled, also gets lost in traffic, not worth the risk andhe still offers more rebound as a FB than any other FB so it's still a win in that regard.
He gets the best results when he's running in a straight line on the leading forwards hammer, his closing speed and ability to get a fist in is already at a very very good standard, just needs to improve his one on one work for when the ball gets bombed deep in the square, (btw this is magnified when Grimes isnt playing, as Grimes comes in 3rd man up and takes the heat off him)But dear lord, he would get mauled standing at CHB.