"Their mission is to provide high-quality, usable KDE software packages to
Fedora users and developers"
Again, QupZilla is not KDE software.
Not everything Qt based is KDE software, and not everything from KDE is
good enough, they just don't make every type of software, Konqueror is
using deprecated component, QtWebkit, nobody can guarantee that QtWebEngine
will continue being supported and improved, will Qt deprecate it like
QtWebKit? Nobody knows.
As for GTK dependencies, they were in the spin before Firefox was added,
for some management tools.
I wish Qupzilla developers luck, I thank them for their efforts, but I
believe that without supporting extensions (widely used ones, like Chrome
extensions), this will not go far, rekonq made me hope, they once stated
they will support them, then it all vanished.
I think Fedora KDE spin should aim to be the best OS (it might already be),
not just as a showcase of "only" KDE software.
Regards
Mustafa