Thank you for that suggestion!
I was curious what GNOME Shell might look like.
Installing on a second machine running Trisquel 5.5 gave me the GNOME desktop
after installing gnome-shell and gnome-session.
On the Trisquel 6 machine:
The following packages have unmet dependencies:
gnome-session : Breaks: gnome-shell (>= 3.0) but 3.4.1-0ubuntu2 is to be
installed
E: Unable to correct problems, you have held broken packages.
it appears only one of the two packages can be installed at the same time.
and there is no GNOME at the log-in menu selectable or offered (using GDM).
but, well, i figured i'd stay with GNOME Classic anyway, as the short test on
Trisquel 5.5 didn't feel comfortable to me.
thanks anyway!
