For edge + exp holders, the new changes are only marginally better on some spends. Ie shopping and petrolI think it's worth holding your cards for the credits then make a decision when your next Annual fee is due. While the reduced earn is poor compared to what we've been used to, it's significantly better than what Visa and MC can offer which I'm sure is a key reason Amex was comfortable in making these changes. I'm sure they also didn't want to become irrelevant like Diners is now by not meeting the market on merchant fees.
For me the exp is now virtually worthless and the only reason that I could see to hold is for those that prioritise kris