Your question might be best asked of a lawyer familiar with these sort of claims.
Honestly? I'd be guessing if I even tried to venture an opinion about what is seen as "acceptable" for the work to fix your vehicle.
As an Owner of a brand new car .......OF COURSE you want it....."perfect"!!
The real question here? How close to "perfect" would a civil court demand the dealer be as he delivers it back to you?
His comment that you're "nit picking" may or may not be considered reasonable.
I don't know the answer but I bet a lawyer familiar with this sort of claim could cut through the confusion VERY QUICKLY and if you're right about expecting nothing less than ABSOLUTELY perfect......he'd probably be able to get 'em to play ball pretty quickly.
2014 Mustang GT-Black-Track Package