"factory" respray? Please that is BS, unless new panels were sent from the factory (then you'd have to worry about the match).
If I did not get a chance to see the car, in person prior to the "repair to new vehicle condition", I'd reject the car outright. I know it makes sense to have this work performed quickly, but I trust dealers as far as I can throw them (actually less). Then again, if I was caught short, needed a car and an suitable, alternate vehicle was not available I might consider it. Yes, I would want a sizable discount. The factory paint has been resprayed and the value of the car has dropped as a result. Trust me, anyone who knows cars and looks closely will know how many panels were spray. The more panels affected, the more the value of the car is affected adversely. Resale is a bitch when this happens.
Sorry for being a Negative Nelly, that is the way buyers will see it when it is time to sell.