Enable scale-based symbol sizing for multi-layer symbols in ArcGIS Pro

[ChristopherBertrand]

I was looking to create a distinctive symbol for an underground line.  What I came up with was a line with "Along the line" markers.  It worked well until I began looking to adjust it to smaller scales.  I could enable scale-based sizing for the line but not for the "Along the line" markers that also make up the symbol.

Please consider enabling better control to scale-based sizing for complex symbology.  Similar to what was stated in the ArcGIS Pro Scale Based Symbology - Single Symbol Idea, there are many reasons to not want to create multiple layers to depict the same data. 

Before scaling considerations.	At a small scale the lines are this tangled cluster of points.

Thanks!