Yep, Vizio is replacing it. They asked to see a picture of "actual content" in addition to the two I posted. That was tough to get since it's easier to see (but still occurs fairly infrequently) with motion, but I guess the picture I provided was good enough since they agreed to a replacement.Not the worst I have seen, but still pretty bad. Replace it.
Black field uniformity will look bad on any Vizio unit with AFA off. It isn't something I would look at as it is pointless.
My P75-C1's uniformity was way worse than this one in that it was apparent much more frequently, but I was disappointed to say the least when I saw the jail bars and non-uniformity on the PX75-G1. Hopefully the replacement will be an improvement because everything else looks great.