depends on what the use of the car is and driver skill.
Yes, technically we should be taking all things into consideration when making any change to the car. But if you're not driving 10/10's on the track, changes that pull the car away from 50/50 weight distribution will go pretty much unnoticed.
In my 2500lbs track car with 185hp, when a passenger sits in the car that's corner balanced for me alone, I feel a huge difference. Why? Because the passenger has added almost 10% body weight to one side of a torqueless car being driven at 10/10's.
To take that idea further. consider how a novice (say 10 or fewer track days) will drive at the track. a 200lbs instructor in the passenger seat does not result in slower lap times.
If you're just driving around on the street, honestly don't worry about the negative impacts of a CF hood or rear diffuser on balance. Your wheel/tire/suspension choice has a much greater impact on how the car actually handles. The rest is along for the ride.