I think the the mid-field issue is over talked ... Tyrone won 3 All-Irelands and there wasn't any significant mid field displays in that period .. they always played a fifth man team game. That had one chief driver and that Brian Dooher. He is now bringing that effect from the sideline and has a unbelievable "never say die mentality" ,will to win and experience. I'd say Tyrone will start McShane now that he has had enough game time under his belt. When given the correct type of ball he is actually unmarkable with his ability to score off either foot, they just can't wait until the second half to bring him on .... although you never know. They may prefer to wait till the 3rd quarter when the will have assessed Mayo's strengths and weaknesses.