In SSAS Tabular 2017 there is a new measure property, "Detail Rows Expression" to define a custom drill-through DAX query. Similarly, there is a property for the table, "Default Detail Rows Expression". Having these properties configurable within Disvoery Hub would be great.
Details here:
https://www.sqlbi.com/articles/controlling-drillthrough-using-detail-rows-expressions-in-dax/
