you got a set of variables to adjust and that does include dampers as well as geometry .Still weight distribution is fixed so a strong tool is taken away.
speaking of setup windows and relating it to temps-as Brawn said -i think he is speaking of getting the front and rears working in the same temperature area ,so both front and rear tyres reach their highest working temperatures at the same time when being pushed .
Brawn spoke of a optimum temp which you could be over and under 15°C defining your working window.So if your front tyre is at the top of that window when the rear is just reaching the lower end of the working window you have yourself put in a situation where you might have a useful window of justa few degrees.
I´m not implying that temperature windows front end rear are the same so maybe the window for the front is a lot smaller than the rear or the other way around...