surely it depends also on the type of player who is passing the information on?

Andrew Johns or Darren Lockyer for instance would be of great benefit to a halfback, teaching them the different kicking skills he had, when and why he would use individual kicks, what he would look for prior to making his passing decisions, little things he had picked up that help against bigger players/smaller players, how he would target someone with poor footwork, how he would recognise poor footwork etc.

Matt Gidley or Keith Senior could teach a centre a boatload of skills to help put their winger away,

there is always a balance between physicality, skills, and knowledge which makes up a player. A player like Buderus is much less physicality and much more about skills and knowledge he may not be able to make McShane a speedster, but he may have knowledge of training techniques which he uses which will give him another 10%, he clearly has the knowledge of picking and choosing the runs which gives him another few percent, which can make all the difference.

Some players are based on their physicality and their value is teaching younger players is lessoned, Inglis isnt a great player because he has great RL knowledge and a great RL brain, he is a great RL player because he is an outstanding physical specimen who has learned a good amount of RL skills, he will have much less to pass on than say a Matt Gidley or a Mark Gasnier

Read Buderus' book for just one example of what he has at least attempted to pass on to McShane. A substantial part of a players game is natural ability and his own personal style. But anyone trying to suggest they don't learn from each other is naive in the extreme.

What's that? Holding down???

Read it and find out.

i think he could be a good player he just needs game time