Modify BOM balloon line thickness in Illustrate

Some customers complain about the fact that, in Creo Illustrate, it is possible to modify leader lines of BOM Balloons (Item numbers), however, it is not possible to modify line thickness of the shape itself (if circle has been chosen, line thickness of the circle should be editable)

Thickening just the leader line, for instance, creates a dubious image.

It would be an improvement if not only leader line thickness can be modified, but the actual BOM shape line thickness as well.