Design advice needed

amir_tohidi Another option is to show aggregated visuals, (giving actual value to see things) and if they want to look at the data - have them use the "Export Data". Worth seeing if this works in the Service, that way, if they want to sit and wait for the records to load, they can. 

Best case I would think is to meet them half way, set up visuals that are meaningful, slice them down to smaller chunks, and then they can export smaller pieces. Regardless of what anyone says, a report with a million rows is meaningless, there is no way they are looking at it all. If they take that and filter it down, then have them do that prior to exporting it from Power BI... Another option would be for them to Analyze in Excel off a report if they want to get more granular. (just some thoughts).