I think Ferguson has been fantastic in the FR Cup for SA he hits boundaries in the Power Play Overs using normal cricket shots with good placement but can also improvise to get runs.
I think the argument against Carseldine and definatly Dighton is that why would we want to blood guys in there mid to late 30's when we can give much younger guys ago. Both Voges and Ferguson would be mid to late 20's.
I think it is the right way to go have a look at some potential for the world cup in a couple years.