We agree 100% with the suggestion and are exploring ways to enable this. This represents a significant amount of engineering work hence we don’t have a schedule to share yet.Øistein Kjos commented
The reason why onedrive and onedrive for business don't talk to each other is that onedrive for business is not a onedrive. It's sharepoint with a fancy face.
This is like skype and skype for business. Microsoft is tricking you to think they are two versions of the same program by using the same name but they are independet non-compatible solutions.
We're going back to dropbox because of this.
The reply from Microsoft "We agree and this is something we’re looking at - 2016" should be enough of a warning