My backlight looks basically indentical to yours. A bit of pinching on the right corners, and a tiny bit on the bottom-left but all very mild. No yellow blob, no crosshatching, no stuck or dead pixels, no buzzing.
The only thing with mine is that there are 2 spots, close to the middle, maybe 4 pixels each that are just a tiny bit darker. Impossible to tell with any complexity or motion to what's on screen thankfully. Even on a solid colour I have to lean forward and find them again each time, so given how good the manufacturing is on all the other aspects, I'm keeping it. For all intents and purposes they look like spots of some clear liquid that dried, if any of you have eaten fruit like watermelon infront of your screen before and gotten some spots, that's how they look.
Good thing you posted photos btw, I meant to do so but have been too busy drooling over this thing and how it makes my secondary monitor look just awful.