They all look like excellent topics to me. +20 
Once another editor “+1’s” your ideas, please do go ahead and create the cards and start writing the articles. The only one that I see any potential for problems with is #5. I’m sure a few people are bound to balk at a few of the items under point 5, but such things have been published here before.
P.S. The following user’s use case might make for a great example/demonstration on #8:
Using DNF group remove @kde-desktop-environment removes Gnome WiFi dependencies