"The office suite is LibreOffice, but surprisingly, the stable version 7.6, not the newer version 24.2 found in upstream Ubuntu."
I'd have thought that word "stable" makes it unsurprising.
"There are more Microsoft-like Linux productivity suites with a Ribbon UI."
There are also Windows versions of them. Even friends who use Windows are using these rather than pay for Office.
"There are some unwelcome GNOME accessories with their weird CSD button-bar, such as the Evince document viewer."
Perhaps KDE would really be a better choice of dektop for an emigrant from Windows distro.