Ahh, my favourite topic
It sounds like it could reduce some of the support questions which is good.
Putting aside the wizard page discussion, I still think that it would be nice if Calibre more explicitly from a user perspective gave them a preferences option which was to the effect of "Display my author names LN, FN".
I understand it is isn't trivial underneath and it has implications. But as a user it is the level I want to understand.
As a plugin developer I currently have the conundrum with every plugin of needing to have its own configuration option to effectively replicate just that. Because a three-way tweak (which is about setting the value of author sort, not the value of author) doesn't give me what I need.
With Kovid's permission I had to add a pref for metadata download that a user can check, so now we have yet another setting. And I have another one in the Goodreads sync plugin. And I have more logic in plugins like Search the Internet which attempt to detect LN, FN and order it into FN LN because many websites give best results with that. It is all sorts of variations that are workarounds and fudges because Calibre does not have a central setting that everything could look at.