His tap work is not the problem and never has been, it's his complete lack of presence around the ground. Barely recall seeing him outside a ruck contest until the last quarter. Lost & lazy. Do you ever see him back filling a hole or taking an important mark like Maric does? Harrassing opponents in the midfield? For all his athleticism does he ever use it - taller, faster, more agile than Maric, yet about 1%of the physical presence & work ethic.
You just can't afford to can't afford to carry invisible ruckmen in general play in the modern game. Like an Angus Graham who can win hit-outs - and that's not a good thing. Hell, at least Graham occasionally got in the way - even if was more often than not of his own teammates.
Injuries were not the only reason a ruckman with such impressive hit-out to advantage numbers was getting left out of his previous club's first 22 so often.