Well finally, the Reserve Bank of Australia (RBA) has put a cap on the interchange fees. As such you should see on your EFTPOS fees a reduction on the card fees for the more expensive premium cards. Furthermore, check to see if you are going to pay more for the regular Visa and MasterCard debit and EFTPOS which some providers are passing on to the merchant.
Most importantly I do suggest that you do check to see overall, what are your new Merchant Service Fee?