Over engineering? Oh, don't get me started ;-)
Sound isolation walls are built with staggered studs, and insulation not making contact with both faces. No direct path of noise transmission. I have no idea if they're efficient with all types of noise, or not. Maybe better for impulses than higher frequency ssound?
The other thing I stumbled across with a tiny house project is, they make thinner insulation for interior walls. Specifically to NOT couple one face to the other.
So maybe the Zip system panels wouldn't be the way to go. Same goes for all the web blocks tying the faces together. But man, staggering all that to avoid coupling sounds like a nightmare.
As for the weight of an 80" door, you 'just need an outboard wheel to support it. Likely the pad, if there even is one, outside garage doors would be sloped for drainage. So ...
The wheel needs to float, maybe spring loaded. Or an air cylinder ....
Sorry .... ;-)