I’d like to make a suggestion that the virtual desktop pager be replaced with a button that opens overview by default. I find that Overview is much better suited for working with virtual desktops than the pager. Another problem virtual desktop pager has is that it takes up a lot of space if you have more than one monitor and multiple virtual desktops. This change would also make the overview effect more discoverable, because the only way to use it right now is the keyboard shortcut.
This is what the pager looks like with 4 virtual desktops and two monitors: