Disable/hide visual borders when hovered over, atleast in full screen mode. It makes the UI look pretty untidy.
Do those planned customization options include the ability to fully remove the visual header in Report View rather than just making it invisible? The feature added in March to make it invisible in Report View makes it looks nicer but the headers still take up real estate when you hover over it, which limits how your ability to make full use of the canvas (you can't have overlapping slicers, for instance).
