>The GNOME Fallback is indeed, heavy and eats up quite a lot of memory
I ran TRisquel default iso with gnome fallback or flashback whatever it is called on an atom with 1 gb ram. It was fast and smooth. Indeed I reckon it is my third favorite DE after the perfect Xfce and the awesome Mate.
It did have some issues though on that atom with integrated Intel GPU and video acceleration. I experienced weird screen flashing on the top and left border of the screen while viewing photos in eye of the gnome (I think that was the application) and the gthumb and others I tried. I recommend you purge compton if your lappy is very slow.