I get what you are saying, but my point is that Moylan was 1 on 1 last week and just got palmed off and run straight through.
It was implied Sifa had made a bad read by not coming in to help Moylan however Moylan should of been able to make the tackle and Sifa did the right thing by staying on his man or else he creates an overlap.
There is a reason nrl teams often run plays where they end up with someone one on one with a half though (or run a prop at a fullback in the line).
Many many tries get scored through someone who 'should have been able to make the tackle'.
Of course we can always theorise Trindall would stop them all.
But yes I agree, the outside man often won't be in a position to come back inside off their own man to help. Usually more likely the next man in who is already sliding out can get there. Alternately you shoot the outside guys in a spot each to take pressure off your half and force earlier decisions but at the expense of leaving space wide someone has to get over and cover. Watch broncos highlights where Mam and Walsh both get across hard to shut down wingers who they have intentionally left unmarked.
Maybe something we could investigate but need Will to be hustling hard to edges to defend the winger. Which can leave us vulnerable back on the inside, especially to a kick back towards the middle.