We all knew this day would come but CBA have joined the enshitification train. The best overview seems to be from Point Hacks with some additional details from CBA
In a nutshell, no more monthly fee waiver and reduced earn rates offset with some monthly 'vouchers' and subscriptions you probably don't want.
Also of note they're trying to sidestep the interchange fee ban by partnering with Discover as a card issuer

"Commonwealth Bank reimagines rewards for everyday banking, helping customers save on shopping, utility bills and travel"
The corporate speak is nauseating. "Reimagines", "helping… save". In reality it's cutting benefits while increasing fees.