Now that we can segment/pivot by Text Values in 2.8, may we please have an adjustable first column width in the Pivot View and have other subsequent column widths adapt? See example file attached
In the file you sent us all of the Pivot views are "Pivot view version 1". If you switch these to "Pivot view version 2" you should be able to adjust the size of the first (header) column by selecting "Layout>Pane/split label size limit" and increasing the value. Does this resolve your problem?