Honestly, it's luck of the draw but really evaluate yourself if it's really unperfect.
First PG279Q i got had no prob, I had that on-the-day of release, I was probably the first "public" to physically have it in the UK.
Second one, that i ended up keeping has absolutely no problem at all.
Dont know if other people are just picky or they really got bad units
I'd say it's imperfect due to the slight yellow tinge in the top left - Am I willing to moan and cry about it, or more to the point return it? Hell no, I'll get on with it. No dead pixels or BLB is a win for me.
Interested that you've got 2 Swifts! That's what I'm hoping to have one day, two side by side