Nico, your reflexion about the continuity of yours differents setup is real. I feel approximately the same think, some values of my setup are often very near races after races. It's compatible with my driving style, but clearly not very fast in all place. However, some times my setup style is realy appropriated at the race of the moment. And when it is, i can ( or must if possible) be efficient.
That being said, it's always interresting to try setups of others racers and trying to understand influence of this or that particular choice, and perhaps adopted some of them.