its a minor one but would be a huge time saver:
Have an option in the settings to use either a Comma or a Dot as decimal separator.
My problem: I am in Germany, so my operating system is in German and uses a comma as decimal separator. However, I prefer to have my keyboard set to English, because then the Z is in the bottom left and Ctrl + Z can be operated with one hand. Unfortunately that also changes the comma on the number pad to a dot, which SketchUp doesnt recognize (since the OS is in German setting).
Therefore a simple option in the preferences to change the decimal separator to either comma or dot (or use the system setting by default) would do wonders to my productivity…