Sure, I can provide billions...if it's ok I can start by sharing one with a time-limited we transfer:
the problem is that:
if you color just the end of the wall with a "material - Cut Lines" pen (eg. pen 143) you risk to have wrong representation in floor plan and near windows;
if you color those end wall lines with a "Element - Cut Structural" pen (eg pen 27) you can be pretty sure that sections (along intersection between walls and Slabs/Roofs) will be wrong:
The fastest way (in my opinion) to solve this problem, is to add the possibility to override just certain categories of lines (because for some strange reasons AC does something similar while exporting DWG files with some settings, so I suppose that it's possible even when we create Graphic Overrides).
Many thanks for your attention and work.