We see this at Raygun with our Crash Reporting and Real User Monitoring products (measuring errors, and end user experience in general). Nearly all power users are more likely to be in product, or very senior/executive developers.
Very low engagement out of QA. I'm not sure if they just have a way they like to work, or they think that if they exist then no bugs make it to prod (don't laugh, plenty of our twitter adverts get comments from folks thinking you don't need any monitoring if you have a tester on the team or if a dev writes unit tests).
Understand how the end user experiences your software. That's the actual source of the truth.
Heck, the burden can be shifted to users! But then you might not have so many users in the future. :(