Hooker Nathan Harris would have been buoyed by his first Super Rugby start in almost two years, doing enough to retain his place for Friday night's trip to the Waratahs, with Rennie's only scrum concern surrounding his side's inability to better capitalise on such a solid platform.
An attack that in the first half made regular inroads into the Rebels defence soon regressed to the type of loose ball-handling that restricted the Chiefs' impact before the bye. But there was enough quality in the four tries scored in the opening 40 minutes to offer hope heading into the break.
While Seta Tamanivalu will likely miss the Waratahs match after his impressive evening ended with a rolled ankle, a ready-made replacement looms in Charlie Ngatai, with the midfielder set to return from a concussion lay-off.
And the focus for Ngatai and Co will be about replicating what worked in the first half on Saturday - and in the competition's opening rounds - but wing James Lowe believed such form was fickle.
"It was good in patches," he said of the attack. "It would be great to get back to those first six weeks and I don't think there's any magical formula. Some nights, it sticks, and some nights, it doesn't."
When it sticks, Lowe said it can be as enjoyable to play in as it is to watch.
"It's been fun. You look at that backline, even without Charlie Ngatai, it still had a wee bit of flair. It's exciting and it's contagious - everyone wants the ball in their hands."