I think with a lot of the QA, interactions and subtle design nuances, I'll hand folks handling the front-end the css/js for those interface components. No extra effort on their part, unless they have to worry about polyfills for browser support. The good thing is if you're providing the front end code, you've already fine tuned the details and don't have to worry about the nitty gritty details being off.

Swap Symbols > Adjust Type Styles > Margins.. at least how I might attempt to achieve something in my current workflow

Absolutely. Sounds great.