Excel for the web and Excel Online should handle ODC connections to PowerBI
In PowerBI it is possible to "Edit in Excel", which creates an ODC connection to the data model.
But the resulting report is not possible to view/slice from either Excel Online or Excel for the web from either SharePoint Online or PowerBI.
This forces us to build and maintain separate data models for every single report.
Please let Excel Online and Excel for the web be able to authenticate towards the PowerBI, that would make the BI tools much more useful.