Ruben has had way over a year to fix the theme with 6. It seems like he is
going to leave it as is without any effort. What makes you think he is
suddenly going to revamp the interface when the OS is already lagging behind
in its release.
It sucks, considering there are improvements to the fallback session in
Ubuntu 14.04 according to
http://www.omgubuntu.co.uk/2014/04/ubuntu-14-04-classic-gnome-flashback-session.
This is why I don't recommend using the stock ISO images for Trisquel to
anyone. Just start with a clean netinstall and add either Cinnamon, MATE,
Gnome Shell, or XFCE. Heck, the Elementary OS desktop can be installed on
Trisquel 6 if you have the PPAs.