I can understand why you are confused. We aren't currently at a state yet where we can provide a roadmap or time frames for MLAPI. Once we have our first Unity release of MLAPI we will be able to provide documentation for the new features we are working on. Regarding our changes, some of them are quite substantial and will break backwards compatibility with the current version of MLAPI. We will provide guides and support for upgrading your projects which will hopefully make upgrading less painful.