Hi @maxweissboeck ,
If you are looking to create a dashboard with several data sources, you could create an account with different data cubes and combine them in one account dashboard. See an example here: Dashboard creation from multiple accounts - #2 by zane.baranovska.
Nevertheless, I understand your request for a dashboard that combines reports from several accounts. The idea is still there, but, indeed, it has not been implemented yet. I added your vote to the ticket and will update this post once there is some news regarding it.
Lauma / support@eazybi.com