I think you may well be right. I have not found any other way to readily solve this.
Generally, I prefer Gnome/Gtk apps but I must admit I don't like loading swags of dependencies so when on a KDE install I tend to use KDE apps. I actually do prefer Akregator to Liferea but it is one of those damn apps that is so intergrated into KDE that I hate running it under Gnome.
I guess I will follow your line with the configs. I can write some simple bash scripts to do the rsync and I guess that's what usb flash drives were invented for hey?!
The only other option I have come across is to use one of the Firefox newsreader add-ons. That starts to turn the .mozilla folder into a nightmare & I think would still have version & profile problems.
Hmmm, thanks for the thought,