I'm testing Moksha,e17 and e20 on my debian system.
I found that skippy xd is a fine working possibility to get an expose / scale windows effect in enlightenment. It is not a good replacement for alt+tab, but good for use with the mouse. I created a starter in ibar for mouse-use only, and that works fine. Even minimized windows are displayed including their content.
In the configuration file I set showAllDesktops=true to see all windows on all desktops.
I had some trouble with ecomorph in moksha, and in e20 it can't be build at all. The scale-windows module cannot be build, too.
(I couldn't enable composite in moksha without ecomorph, so I'm trying e20 for now.)
Maybe this information is useful for someone.