Maguire later suggested Luke's form had not been up to scratch, something not an issue prior to the Warriors' coup being revealed last week.
Maguire said: "We've got standards in our club about how we play...it was just a bit of rotation there. "
"Both (he and Luke) talk about his game quite a lot and we agreed we wanted to start with Camo tonight."
Maguire praised Luke's performance but wouldn't reveal specifics over a benching that has surprised players-turned-pundits and fans.
"He was good and brought a lot of enthusiasm," Maguire said. "Issac brings a lot of that whether he starts or if he's off the bench. It was just a bit of a change up tonight and I thought it went well."
In a Fox Sports poll this morning, 70 per cent of fans voted that Souths had got the decisions wrong.
Commenting on Luke's benching halfback Adam Reynolds added: "He got a little kick up the bum there during the week and I thought he responded well".
The sixth-placed Rabbitohs next play the Storm on Saturday night. Whether Luke continues to remain on the bench could become one of the talking points of the season.