I think the biggest concern is that it is Argentina controlling the narrative. If they relax then Wales get some gain line success & points (as any international team at all levels should). But when they focus -& you can see the switch flicking on- Wales cannot contest. And so far, the Pumas are playing quite a distance off how good this team are!
Wales have to try to disrupt the second forty, they have to hope that the Pumas switch off, because they cannot control the narrative at all & don't have the power to wrestle the momentum towards them.
Its a worry.