You've got it ass backwards. The only people doing the rationalizing are the people that have already bought the product. It's called post-purchase rationalization. The iPad Air 2 is a flawed device; absolutely no doubt about it. I wouldn't go as far as saying it's defective, but it's not at the standard I'd expect considering its price point.
I was 99% sure I was going to upgrade my iPad 4 to the Air 2 following the announcement. After the screen distortion and vibration issues, I'm not so sure. Nexus 9 is the only Android tablet that suits my needs, but it has even more issues than the Air 2 unfortunately.
I was hoping to sell my 4 when it still had decent value. No idea what I'll do now.
You don't even own one so I don't think you are in a good position to make that statement. Things get blown WAY out of proportion here. I suspect you could give the Air 2 to 1000 people and you'd be lucky to have 1 of them who noticed this on their own. As I said earlier, the only way I can see any trace of this is by purposefully pressing on it in exactly the right spot with a ridiculous amount of pressure. Holding it as I normally would, even with the Smart Cover hanging off? Nothing.
The iPad is a 6mm screen with a near desktop class computer behind it. Of course if you press on the screen you'll distort it. Ever pressed on any other screen you own?
If you think the QC on this product is bad, you'll go absolutely insane with the competition which at its best makes the worst iPad look like a work of art.