I just received my unit yesterday, from the previous drop, and I'm quite happy with it. No backlight edge bleed I can detect, uniform illumination, and only a single flawed pixel I could find (with broken, as in always dark, green and blue subpixels) about an inch from the left side toward the middle. And I was only able to locate it after poring carefully over the whole display from about 5" away.
The 144Hz refresh is amazing. Coming from my old 24" 60Hz Dell U2410 it's much more noticeable in regular use than I'd anticipated. I'd expected to perceive it clearly in FPS gaming, but I hadn't considered how it would make normal desktop computing so much more fluid as well! Just moving the mouse cursor and dragging interface windows around is so much smoother and less visually fatiguing. Overall I'm quite pleased!
If I had any gripes, they'd only be that I'll miss the convenience of the integrated USB ports on my old monitor, and that the EDG-27 stand adjustments are a bit inconsistent. Landscape/portrait spin of the screen has very little resistance, while the twist on the base to rotate the facing direction and the hinge to tilt the screen forward and back are both quite stiff (to the point that I feel slightly concerned about the structural strain and so take more care than I'd normally expect should be needed when making those adjustments.) But both very minor issues, really, contrasted with all the improvements!