Maybe a bit late but there is a very easy way in kicad 5.1 to get reasonably good BOM output without ever going through the BOM tools. Just open the field editor, group as you desire and then select all, ctrl+c and ctrl+v in any spreadsheet application of your liking.
And the 3 fields you list are also easily exported from pcbnew.
For all options that i know about see How to create a bill of materials (BOM)?