You are of course correct that we should normally follow what
do; however occasionally we do change some defaults (for better or
worse). In this case, I don't think it's clear, a lot of data (the Largo
presentation, other distros, just observing users) might suggest the
current default is not the best one. I don't know
This isn't the sort of
thing we should diverge from upstream on. If it
makes sense to change it for Fedora, we should lobby to get it changed
upstream as well.
This case in particular is silly, since Alex (who wrote spatial mode) is
upstream GNOME and downstream Fedora.