Quick check box in nav / control bar for scale stroke and effects
When an object is selected, put a checkbox in the navigation / control bar to quick toggle "Scale Strokes and Effects".
I work professionally as a pre-press graphic designer and I constantly have to switch back and forth due to specifications from rip softwares. I normally just go through and select all the lines I need to be a constant weight after resizing them and change them manually. This is time consuming.