TM, the majority of games he played as the sub. Can give an 18 year old with a handful of career games coming on as a sub some slack.
His goal from the 4th row from his first kick in AFL and his goal assist to Dusty vs Adelaide suggest he'll be OK. I'd say he's going OK for a kid, regardless of where he was picked in the draft.
Save your concerns for our depth of B Graders with 10 times the game experience as Ben yet show no more talent than him and we keep them on the list.