I have now redirected all my utility spend (phone, internet, counciil rates, school fees, insurances etc) away from the Reserve card to the CBA Diamond Amex which still gives me 3 points per dollar (6 times more than the enhanced Reserve card).
Even if the burn rate on the Diamond card is greater than Membership Rewards, it's not 6 times worse!
All supermarket and petrol purchases are directed to DJ's Amex (also 3 point per dollar).
All BAS and remaining non-restaurant purchases that do not accept Diamond or DJ Amex (or where the surchage differential is excessive), go on the Citi Signature card (1.5 points per dollar).
What that leaves on the Platinum Reserve card is only restaurants (and that is also only when I can't also score a bottle of wine and 3 points/$ on the Citi Dining Rewards program). I hear the 3 points/$ on the Citi card is also ending soon!
As far as I can see, the only benefit (to me) of this "enhancement" by Amex is that my points are now earned in a diversified manner and not heavily weighted to Membership Rewards as it has been for the last 15 years or so. It has complicated my spending patterns (and the wife is not too happy about this either), but I'm hoping we will get used to the new world after a few weeks!