Doubt Miller will be delisted and if he is will likely be redrafted as a rookie - rated highly by the coaching staff ....not to mention Tom Lynch.... 
Miller is very interesting.
Since joining us he has been mostly stuck at CHB learning the trade and really going nowhere.
I think he was getting a bit stale. Putting one foot forward and going back two.
Late last year he was given a few games playing in the ruck and responded well.
If the coaches do rate him it may be because of this.
Let the pressure off occasionally and just let him enjoy the game while he learns.
A contract renewal will tell the story.