Hi, I found an insightful mailing list thread on KDE distributions list
https://mail.kde.org/pipermail/distributions/2016-March/000033.html
Late replies have some ideas about what to include and what to not include for the best of users AND KDE.
I hope more Fedora KDE developers (I thing Rex is on that list) read the opinions presented there and maybe subscribe if not already :)
Regards Mustafa