Hi @atraviezo!
To answer the basic question: There isn’t a plan to have a separate API for Files as they exist today but we do want to enable the kind of workflow described. The more nuanced answer is that there are some updates coming to the Files experience of the course of next year and so our plan is to make sure that there is an API to access Files that leverages those updates. That will include Event support for those as well as the ability to manage collaborators through the API.
I’d be happy to chat more, and it might be really great to hear more about your specific workflow. If you’re open to the discussion, my email is ryan@adobe.com.
I hope that helps but realize it’s not ideal news.
=Ryan