Well, all teams do it. It's a routine to change wings and many aero parts for Monza and Monaco, the season extreme circuits, where estimated Cd is 0.75 and 1.25 respectively. So, Adrian, I say good thinking, but a bit too late.
Actually, I guess those two extremes plus the 90% "intermediate" circuits that Tumbarello mentions are what constrict your design.
I'd say more.
What the driver needs, his essence, his gene load, his inheritance, his soul, his style is probably more important: there are people that like to go fast in straights (pedal to the metal drivers) and people that extract the juice in the curves with a tad more down force (slow in/fast out drivers).
You might remember that the day you design your car: cars are not made in a void. Cars are (I exaggerate, I know) kind of the suit of the driver...
carbon fiber suits that have to be tailored to those guys.
I have the fixation, after teaching people to drive karts, that the former "pedal to the metal" drivers are "heavy" drivers, a tad reckless, leather jacket guys, while the later, "apexing carefully" are "subtle" drivers, kind of cerebral, nerd drivers, wool sweater pals, but I might be wrong (and I might be using too many adjectives instead of numbers lately for lack of time... I know most of you understand my changing relation with this forum, lackadaisical these days).
Having said that, it's true that there are "faster" cars or maybe faster drivers, as I said, like, I think, this image proves (as any statistic, you can use it in any way you wish for your secret hidden, malevolent and twisted purposes, mwahaha,
or your innocent, pure and altruistic motives, kumbaya) :
You can see that a couple of cars varied wildly from one year to the next one, but there
is a tendency: most fast cars are fast in both years, while slow ones keep being slow, exception made of Hamilton, Rosberg and Nakajima, but those guys were either rookies or rookies, finding an style. Differences are a few km/hr, but I like Poirot and Mrs. Marple stories and it
is Caturday night while I post.
Now, JTom, that's a lot of a stretch, ain't it?

However, I like it because it shows I'm not "good people", Adrian, I'm bad people that enjoys confusing tender minds...