We haven’t done any integrations with opensmile or any other emotion engine, but would love to see a project that makes use of the technology.
As for an avatar, I expect you can make something awesome using the Mycroft KDE Plasmoid, but we haven’t done any work on it yet. Once again we’d love to see a contribution that uses an Avatar to better interact with the user.
Keep the ideas coming and, if you have time, grab a text editor and submit a skill. We’d love to see something awesome that uses an avatar and responds to users based on the emotional context of their query!