Let me start by saying, after 5 years and 60,000 klicks I still LOVE my C7. (Though I wouldn’t say no to a C8 someday).
But my list of pet peeves with this car includes:
#1. Stiff ride. I don’t think I would buy the magnetic shocks again, as I have never taken it to the track. I have even had the performance tuning done, which helped a bit, but not a lot
#2. Road noise. Haven’t done anything about it yet, and is not something I notice when I am alone, but it is an issue with someone else in the car.
#3. Cup holders. Too much split coffee.
AND the fact that I got out pulled on the highway by a Ford Festiva! Turns out it was a super charged sleeper with nitrous.... I knew I was in trouble the instant I heard the whistle of the blow off from the pressure relief valves, which is saying something considering I was WOT at the time! 
In all seriousness, props to the Festiva guy. He built a FAST car.