Looks like it's still working for me anyway. Firstly in my account postage preferences I've only selected Royal Mail. Then in my listings I select Advanced Options under the Simple Delivery section, ignore the 'warning' splash screen and select Custom Options, and then I can select the postage service and price I want (and my old rate tables still work).  Also the buy bulk labels option still works, which is a godsend in both time and paper saving. Fingers crossed this doesn't change anytime soon.