One of the major fiberglass insulation manufacturers (the color in the lead photo gives away which one I'm talking about) is getting serious about the installation quality of fiberglass batt insulation. They've put out a video (embedded below) and a document showing how to achieve RESNET Grade 1 installation quality with fiberglass batts. Have you seen these things yet?
Fiberglass – Reichel Insulation
Is Your House Too Leaky Because of Fiberglass? - GreenBuildingAdvisor
vapor barrier Archives - Hansen Buildings
When To Use Foil-Faced Batt Insulation Drywall Material, 59% OFF
Insulation - GreenBuildingAdvisor
Building Science-Existing Construction Improvements - Northern Built
Rigid Foam Fiberglass Insulation: What's The Difference?, 51% OFF
Fiberglass insulation - GreenBuildingAdvisor
Foam insulation : r/Homebuilding