Hi, thanks for the review. Hopefully the next version will have the ability to set masks using vertex groups. Regarding smoothing options, personally I never encountered the need for them. Is it possible to email me (at theartful.ae@gmail.com) a blend file for your use case, where you wanted smoothing options, so that I can test on them as well?
Your addon is amazing! Please add the options to choose mask from vertex groups (or attributes) and add smoothing options for tracking, it will be nice!