The feature that everyone has been waiting for has landed - Expose in the latest update from
elementary daily ppa
From this update, Expose is available in 2 modes, grid or natural
For grid, it arranges your windows in predetermined grid values which is consistent while natural arranges your windows much less consistent
You can set the expose on which corner to be activated from your Switchboard's Desktop Plug
sudo apt-get install switchboard-plug-pantheon-shell
To choose from the two modes, you need dconf-editor which can be installed by
sudo apt-get install dconf-tools
And navigate to org.pantheon.desktop.gala.behavior and change window overview type from the drop down menu
Incase you found any bugs, please do not hesitate to report them at
Gala launchpad
Happy testing !