It's not just back, it's new plays.
Saints style hasn't changed for about 5 years, that shift play on the left with runners going through the line and the ball going behind. Top defences will be waiting for this, there's no shift play to the right whatsoever.
Don't get me wrong, with Meli & Foster you pack a punch on the left, and the weakness that is Josh Charnley was there to be exploited today, but for me, there's an imbalance left to right. We used to be like that, all went right through Briers, to Gleeson & Fa'afilli.
Decent effort today, Wigan grind out another. I'd like to have seen Saints play more football though.