Sheridan and even Piper provide full back cover for Loke.
He'd being an unlikely callup but Oscar Van Hattum's time in Canada maybe done, and this season's wingback setup would likely better suit him than last campaign.
With Payne well at least this injury happens at a good time re his World Cup hopes. He'll only miss the November AW games. Though might be awhile before he's doing throw ins.
I had a work mate years ago in Melbs, who was a useful VFL footballer. He had done his shoulder (pretty common injury in Aussie Rules), had surgery and every hour or so stood up do arm stretches with a big rubber band. All part of a lengthy rehab.