I will definitely drop Plat Charge and also Plat Reserve after this change. I really only need Plat Edge as I won't travel much next 2 years.
I think the whole change is to flush out all the average transactors and people with their own ABNs to pay ATO bills etc. They want Amex Plat Charge card to be used for frequent travellers, and reinstate its "class" above other average CCs. In Asia they see Amex Plat Charge card as high status hence they probably want to reinforce it.
I am hoping that Citi will upgrade my existing fee free Citi Plat visa to Select very soon.