Is he actually refusing to play in the final? That's really, really poor form...doing a McCarthy/Balic, surely he's gone.
Brisbane themselves wouldn't put up with that behaviour and would probably trade him out on their own free will...they're starting to build have have some talented youngsters who seem invested and dedicated to Brisbane, don't want players like Schache upsetting that.
TBH seems like a bit of a Jaksch type...there was a story that he's a shy guy and doesn't really get along with the other players.