Main change in this release is moving to decoupled architecture, with APIs providing access to front-end clients. It is not headless - there web application with administration and content management, but blog itself can be anything.
Tonight I released Blogifier 2.1. I also installed it on couple sites that I'm going to support moving forward. Having multiple instances running in production environment puts a lot of restrictions, because support and maintenance on the live site takes a lot of time and effort.