Booted to saucy today saw your post.
zika I have the same repos or ppa's as you do enabled, only diffrence is I am running 32bit (should be a non factor though)
Took the plunge today and everything went smoothly,
Code:
gnome-shell --version
GNOME Shell 3.11.2
The same icon & fonts blowouts acured & I only lost topicons on extensions.
Been playing with it for a couple of hours now, No show stopers yet.
Regards