Hmm, seriously I think Sheens entertains the idea that any player in his side must be able to use the ball, but then that doesn't explain how Halatau is named each week.
I think as far as backs go, they obviously have to be quick and know how to finish off a play, but really, the Tigers have lacked outright pace this season with Lawrence being sidelined We've got Ryan on the wing who is certainly no flyer. Ayshford isn't lightning but is quick enough to play in the centres while Moltzen is deceptively quick.
The Tigers are renowned for their mobility around the field so I guess Daniela offers speed, which is handy to have and I think the way things are going, the Tigers will boast a speedy and potentially quite sizeable backline next season depending on selections.