you've isolated one of my points and have fixated on it.
Its not so much that mckenna takes his spot, its that his spot was up for grabs because he wasn't doing enough to keep it. woosha was playing huge emphasis on ball movement and gleeson killed several movements. so he got pulled.
I think mckenna has been notable as a ball mover in the vfl, as a result deserved a call up. I also think he was a good player in the 2nd half of last year for us.
on frang they've been playing him forward and in the midfield. I also think he can and maybe should play back but he's also spent time as a junior forward and his supreme athleticism, and reading on the play (relative to u18s) saw him play as a sweeping hb in the tac. however we can only go off whatever bizarre shoe horning the club is fascinated with, like langford mid tippa as a defender etc.