Hello Joerg,
I agree with all of your assumptions and conclusions. In fact, the conflict between “Features” and “Configuration” already came up in another issue. A related topic was posted here by @rlkoshak. Sorry for not referencing these.
Sounds great. Are you thinking about guiding the user through one practical example (Problematic because everyone has different hardware, ergo will use different bindings) or is your idea more of a general walkthrough (with the danger of being to abstract)?
Agreed, even though, the right place inside of “Installation” will have to be decided by topic. This might get a bit tricky because of platform independent and platform specific topics… To give an example: There is a chapter on samba sharing in the Raspberry Pi article. Should it be copied to the “Linux” article? Should it be moved to the “Linux” article? Should it get it’s own menu entry under Configuration?
There will probably be some changes later but let’s just start in this direction? 
@rlkoshak: you aleady volunteered to create the new structure and find a nice catchy name for Configuration+Features. Might I ask if there are any news?