Hi Eric,
Thank you for using the plugin.

I am very sorry for the delayed reply.

Currently, the feature to create a new term is not available from front end. we are still in planning mode on how to handle the auditing of user created terms and limiting the abuse of feature. We are also thinking on whether to use a select plugin(such as select2 to allow cusotm terms) or a plain UI.
It is on our road map and we do hope to make it available in next couple of releases.

If you have any suggestion about the auditing of user terms or the UI, Please share . It will help us accelerate.

Thank you
Brajesh