I'm not sure why this has never been done but seems like the translation to autocad should include an option for setting the LTScale based on the annotation scale for better deliverables to the dwg format. Maybe this needs a coefficient that you can multiple this by to further refine the end result but if I print a border at 1:1 or 1:5 or 1:10 the line scales should all print the same and correctly in autocad but currently we have to manually adjust the LTScale if a customer demands it.