Add a Filter Pane in reports published to web to let users apply filters to all the pages.
Say you modify any of the definitions, it would be nice to be able to undo them.
Filter data from stream analytics datasets through RLS using Roles, this way if I'm monitoring the same service for different customers I can generate only one dashboard and it will be automatically set to show the customer service data unisng only their credentials.
Allow people to select the data they can see and paste it into Excel without using fragile and mostly broken "web queries"
This one may be a bit out there ;) Would be great to have some kind of baked in virtual reality capability - thinking specifically around dashboards that are 360 in nature, so user could turn to see different areas of dashboard using VR headset. Maybe through the mobile app for use in Samsung Ge...
Right click on a measure to display a tree that display's a measure's dependencies: columns and other measures used in its definition.
Ability to connect to Kayako would be hugely useful just like you have done for Google Analytics..
It would be great to lock images so that I can put an object above an image without sending it behind it (hidden)
Being able to put some actions like on click or on selected to show or hide forms also can do it with DAX expression with this we can show forms like containers of filters or like a button show other forms or objects to get more interactive dashboards
Given that there is no OOB support for parent-child hierarchies, it would be great to havfe an automatic converter from parent-child to a denormalized structure.