We work a lot with dwgs for civils and I have a script to turn off specific layers in a designated view template.
I’m looking to take this a step further and either change change the line colours in object styles > imported objects.
It’s probably easier to change in the template as my script is already setup for turning off visibility, however, if it’s possible to change a line colour in imported objects I have global control over dwgs (allowing me to change layers for hatches to green or change all line colours to grey etc…)