The competition's integrity has been compromised by constant speculation and changes which include chopping it back from 18 teams.
More format changes were considered after World Rugby meetings in Dublin three weeks ago, according to the SMH.
The SMH reported: "...a return to round robin is already widely supported by fans in all three of the major markets (Australia, New Zealand and South Africa), as well as coaches and players.
"The Sunwolves appear to be the team most at risk, unless another South African team follows in the footsteps of the Cheetahs and Kings and joins the Pro 14 (in Europe)."