This is a nice idea. I don't know if there is a GUI way to do this (most probably, no), but you can use, for example, the following script at start up to make Ubuntu change to the top left workspace with the middle one:

#!/bin/bash



#check if xdotool is installed

if [ ! -n "$(dpkg -s xdotool 2>/dev/null | grep 'Status: install ok installed')" ]; then

    echo -e "The package 'xdotool' must to be installed before to run $(basename $0)

Use 'sudo apt-get install xdotool' command in terminal to install it."

    exit

fi



xdotool key Ctrl+Alt+Right

xdotool key Ctrl+Alt+Down