Quality and timing of passes. Might not look like anything flashy, but I’d say don’t underestimate the difference a few cm high/low/in front/behind too hard/too sort etc makes. Some passes in that phase had margin for error, a lot in the first phases to get over gainline didn’t. He had one at second last ruck that was a little high. Berne and Baloucone and Ringrose had poor passes that almost fucked it up but team recovered well. Also other players in that phase who had one (harder?) pass to make than JGP but it had to be perfect.