Measuring Mayne on his goal kicking is like measuring Pav on his defensive pressure (woeful), or Duffman a few years ago for his spoiling (non-existent). Mayne is a defensive mid-sized forward. In a functioning forward line, the stuff that Mayne brings is important. The trouble is, we haven't had a functioning forward line for a couple of years. We've had few marking targets, and although Walters was great last year, Ballas has been disappointing for a couple of years, and we don't quite get enough goals from midfield. This puts more pressure on Mayne to kick goals, and he hasn't been up to it.
The corollary is in our backline, where we lost Duffman and Johnno, and all of a sudden quality players like Ibbo got exposed for just how bad they are with the football in hand.
It's about balance. In a balanced team, players like Mayne and Ibbo shine. We don't have that, and then you'd need to consider whether someone like Yarran will be better suited to the composition of the forward line.
I reckon Mayne has two more years of good footy in him. If he went to GWS or North, I reckon he'd look a lot like the player we saw in 2012/13.