Latu, in his first full NRL game in the halves, lost his halves partner a day before the game and probably didn't know who was playing fullback until the captains run. Up to you if you want to form an opinion off that.
From the little evidence we've got to work with, Latu will be an elite half. It's obvious from the way he passes the football, his speed, his punishing defence and his willingness.
You have Katoa , McLean, Iongi, Pattie... all young, outstanding footballers. Latu is amongst that company.