Dolphin is still missing some features that I have set up in Konqueror.
But EVEN AFTER changing your preferred “file browsing” application to Konqueror under System Settings ->Default Applications, Dolphin still runs on mostly any folder operation. I found that the easiest way to get Konqueror to run instead was to symlink dolphin to konqueror. as root:
mv dolphin dolphinx
ln -s konqueror dolphin
Now Konqueror runs for everything.