I have an October 2020 build. I have no issues with my white car. I would say the same for the 2020 Model 3 that I traded in for it. I love the white color, and was surprised when they made it standard. As far as mismatch on the fascias, I think there will always be some difference. Why? Because they are painted off the car. The same is true when a fascia is replaced by a body shop. Add to that the complication of a metallic/pearlescent color that will vary somewhat just from varying your viewing angle.
I also agree with glide that the old Fremont factory is much of the problem. When I consider that all Teslas sold in the US, and Europe, have come from this single, antiquated factory, I am amazed at what they have accomplished. Nearly all of its production run since the 3 have been pre-sold. No other manufacturer has this "problem", the problem being that speed of production is more vital than QC. The Shanghai factory has begun sharing the strain of serving the European market, and Giga Berlin will complete that process. The Austin plant will take the strain off Fremont in the US. These modern, state-of-the-art factories will move QC forward. In the meantime, we have all been part of a remarkable transformation.
Enjoy your car.