Nick, great Job.
If I have same situation, I would exchange it till I get right one.
However, my situation is little bit more difficult to it.
Me and my wife phone is an upgrade from Tmobile and only way I can get exchange is by using buyers remorse.
This means that I have to pay first and wait for the refund all the time when I ask for exchange.
As I mentioned above, I even went to apple store and they don't care because I purchased thru tmobile and what they offer is replace display on new iphone 7plus.
I don't agree with you about glue things because mine was very yellowish (yes I check the night shift), I mean noticeable yellow but, after one day usage, it is gone and now it is just dimmer than iphone 6 plus.
My iphone 6 plus is blue bright like your wife's and my 7 is just little dimmer and darker.... Yes, but when I take a picture, or share same picture with iphone 6 plus, it is notably different.
My only option is
1. Refund and buy from apple store with trade in.... then, I lose about $415.00 / phone, because I don't get special upgrade deal from T-mobile. (Tmobile is paying $415.00 / phone for promotion)
2. Wait till apple provide recall on those date/purchased phone
3. Changes display only on new phone.... (which apple offered)
4. drop the phone in a year, buy new phone with AppleCare.....(Bad choice)
5. wait for ipone 8 or something...
What would you do?