Not sure that Qantas would measure success as having something available for sale lol. They only get paid when they make a sale, after all. Even worse, they're in the business of selling perishable goods. Once that front door closes, they're no longer getting a single cent for that seat.
So I would say the fact that they have their lowest fare buckets available across pretty much the entire calendar is not a great sign for this initiative, especially as it was hyped to the moon.
Indeed, if the purpose of C+ was as you state, they would have just kept Points+Pay and maybe upped the rate marginally. They were clearly aiming for something much bigger than that.
