You are describing a practice that us grey beards used when “Specking Type” before the Mac and publishing apps.
I like your approach and it is definitely needed in the world of variable publishing in the Adobe Apps as well. Any type of efficiency like this will be welcome from web design to book design.
Excellent Article, This is what the design professional must embrace.
I would like to also suggest that any designer that wishes to expand their capabilities into development should check out Hype Pro 3.0
This is a great way to work visually with design tools you are used to and take a friendly approach to development.