Think about it this way. We won Grey Cups with Lawler as our #1, Demski, Adams, Wolitarsky, Bailey.
We haven't won anything without Harris. Since Oliviera and Schoen came in, we've faltered both times in November.
They can get it done without either.
I'd say looking at the landscape, it will be a lot harder to replace the overall game of Oliviera, especially what he brings to the pass game.
Think about 2022, brought in a guy like Ellingson who was always dinged but produced at like a 1400 yard pace when he did play. There's more guys like that around than complete every down backs. You get into a bit of a ratio mess if you need to start dressing 2-3 backs to cover off what you need. Augustine could maybe be one of those guys.