Agreed HBF but a tagger has to get 15-20 possies himself in the midfield these days a la Ling or Rawlings to a lesser extent hurting them both ways. AJ pretty much just negated ( Very well mind you on arguably the best player in the league ) I like him in the back pocket more - This young fella looks to be our tagging future.
I think you are being a bit harsh on AJ. In his second game he managed 16 disposals, whilst totally tagging Hooper out of the game & twice managed 19 disposals in games. He also had a 16 & 15 disposal game & 3 x 14 disposal games. Even when playing on Gary Ablett he had 12 disposals & kicked a goal (Ablett didn't match that goal).
Those numbers are pretty handy in a player's first season, particularly when playing purely as a tagger. The fact AJ claimed some big name scalps whilst still accumulating some good numbers, hopefully points to him being able to really hurt the opposition going the other way once he gets more experience under his belt.