I believe it was handled the best it could be. Shortly after we realized things weren’t packaged correctly I asked that Tracking issue for wrapQtAppsHook · Issue #65399 · NixOS/nixpkgs · GitHub could be opened. All documentation was updated and the new section was even linked there. There were several plans on how things could have been fixed in a semi-automatic way, but I’m really under the impression that @ttuegel is time limited when it comes to maintenance tasks. So for that I’m pretty thankful in the first place that we have Qt wrappers at all. Hopefully we can get all these packages fixed in 20.09 by finishing Abort Qt builds that do not use a supported deriver by ttuegel · Pull Request #70691 · NixOS/nixpkgs · GitHub, and actually deprecating the qt specific deriver.
And on this note, it would be great if we could get more people to help with the QT framework in nixpkgs Qt needs update to 5.14 and more maintainers · Issue #74355 · NixOS/nixpkgs · GitHub.