Improve PDF Export Design

The custom visual "Simple Waterfall" in Power BI service appears (correctly) having thin lines in the background grid.

The same happens in the PPT export.

In contrast, the PDF export has bold lines in the background grid. The PDF export of the native waterfall is correct.

We would like to have the same image design both on PowerBI Service and in the PDF export.

Microsoft Support stated that this behavior is by design. Could you please add it to the road map of the product improvement?