Emilio Pozuelo Monfort published more than one thousand lines of new code this morning across nine patches that work on alt-tab and exposay for Weston. The exposay feature for Weston was previously reported on as part of Raspberry Pi Wayland work and scales all currently-open windows to be shown overlaid across the desktop. It's a nice means of windows switching.
The other big improvement for window switching is Emilio having implemented an alt-tab switcher for Weston's Shell.
Those fresh patches can be found on Wayland-devel and will hopefully make it into Weston 1.4. At the same time, GNOME 3.12 is running along on Wayland.