A way for sharing a dashboard with some users, but not allow the menu, the datasets, and another informations. A web-part for sharepoint with just visualization for example.
Please add power bi viewer feature which will open .pbix in read only mode and show only report not data table and relationship in offline (Intranet). This viewer may be desktop based which help to basic offline user those who don't have internet facilities. Something like this: https://documentation.devexpress.com/#Dashboard/CustomDocument15348
