I have followed the Bluemix/Eclipse instructions to setup the Liberty servers in eclipse. Able to do everything with the Bluemix/eclipse tools except for remote debugging.
Do you happens to be using IBM JDK to launch the workbench? There is an existing problem that we are tracking on the debug support using that combination. If you happens to be using that, can you try using an Orcale JDK 8 to see if that resolves the problem?