Yes and no.
I've invested well over 100 hours of my time working on it, and therefore I do want to release something eventually so that this time and effort is not a complete waste.
However, I've run into numerous roadblocks that have prevented me from releasing a reliable plugin (i.e., one that isn't going to create a support nightmare or a negative impression for new users).
Some of the challenges include the fact that different clients work with their API in different ways or only support certain functions. Some aspects of the MB3 API as well as the clients themselves still need work. There are bugs in the API's websockets that cause major problems when running the MB3 server on Windows 7. The API has also gone through several changes since I started, which required me to rewrite my plugin in order to get it to work. A more mature API that is not undergoing big changes to the way we connect to it would go a long way towards an efficient development path.
These are some of the reasons for the delay, and of course, there is the fact that I am also continuing to work on other VC projects that are important to me and other users, and -- last but certainly not the least -- there's my day job, which is required to pay the bills.