So much for things getting easier/less restrictive after the Boden payment!
There's nothing about credit cards, yet, but the law further tightens controls. Now you can only buy the local currency of the country you're traveling to. You can only get dollars if you're traveling to the US, Euros only if you go to the EU, etc. Good luck finding currency if you're going someplace more remote!
Additionally, now your travel must be confirmed by a travel agency or transportation company. I suppose a print out of your itinerary? Not sure what kind of confirmation they would want.
As for credit card purchases... they haven't cracked down on that yet, but I wouldn't be surprised. I believe they won't directly say you can't use your credit card (or that it was a limit), but the credit card companies will be forced to impose their own limits if they can't exchange. Right now they're getting a pass, but I'm not sure if it will last.