I am still waiting on my 7+.
However even 6 months ago or more, I was thinking I may not want to upgrade to the iPhone 7. Year after year I have purchased each new model. The iPhone 7 is more like a 6Ss, than a true 7. But next year we are thinking there will be a 10 year anniversary model.
My reason for upgrading this year, and every year, is beyond what each new revision has to offer. My household has the 6s+, 6+, 5s and 5. I get the new phone and everyone gets a bump down.
I think there are significant upgrades to the 7, but we can't see them yet. Just like 64bit, bare Metal, Apple Pay, and all other new features over the years, we don't get the full design intent until months to years down the road.
Regarding the screens, there is always something wrong at launch. I don't know if it's relaxed restrictions on B stock or if it's simply the floor manager at Foxconn being a slave driver. Through Christmas we will see these issues. It's a part of being an early adopter of anything. My Day One Xbox One has a loud fan noise all the time. It's a launch defect.
Last year the 6S+ had light bleed binding at the top of the screen and a spot at the lower left. If I didn't go looking for it, I wouldn't have noticed so much. However, because of the complaints, I did notice it and I went through three phones at the Apple Store, where all of them had it. I gave up and went home with the best of the three. This whole year I didn't notice the spot at all. But checking just now. It's still there. Not real obvious but also not really a defect that I would need to disclose if I were to sell, never mind selling it 4 years from now. At $100 to $200, no one is going to care.
I do think the OP is going over the top. However he needs no excuse at all to return his phone. He's not happy - not satisfied, that should be good enough. There is nothing remotely wrong with the iPhone 7. It is what it is. It's not going to hurt anyone. You are just rattling of tantrums. It's not like you depend on any of these features to make money. Heaven forbid if you depended on screen calibration to do your job.
The 6S is a very good phone and the 7 is not much better. I can believe that.
I just don't know anything about the sapphire home button or camera lens. If it's true, maybe last few years Apple had made a point of saying so as a bullet point. This year it's not a bullet point. Maybe it's not necessary. Let's see how things go months from now, if it's a real issue. You can't say Apple is getting cheap on us, not for this.
Frankly I am most upset that AT&T is no longer offering the subsidy. That is a real jerk move, and my bill remains the same, as if I am giving them an extra $225 each year.