The backdoor has been removed in the latest release, but read this thread on reddit (http://www.reddit.com/r/wow/comments/2j ... remove_it/) and you can decide for yourself if you feel that you want to continue to trust the developer.
My personal opinion (as someone who writes software) is that it was monumentally stupid for the developer to have put this "debugging tool" in a release version of the addon. If you want to do on-the-fly debugging and troubleshooting you compile debug/test versions of the software and then inform the testers of exactly what they are subjecting themselves before installation.