On mine (a 2017 13"), I've definitely noticed a pinkish tint at the bottom left corner of the screen, but only when I'm viewing predominantly white-colored pages. It seems to go away and come back depending on the viewing angle. But even when it does go away, I still feel like I can see it *ever-so-slightly*. For *that*, I've experimented by putting up different shades of white and gray on both sides of the screen, and it seems to come out fine every time. I'm starting to think my eyes are playing tricks on me, honestly.
I'm surprised this quirk it isn't driving me as mad as it normally would, because I'm awfully picky about things like this. While I'm half-tempted to go to an Apple Store to get an opinion, I also don't want to open the "return-and-exchange" can of worms again. Did that with my iPad Pro and just gave up -- it wasn't worth it.
Since my MBP has almost no backlight bleed, and no dead pixels that I can find, I think I can live with a little tinting. And since I have AppleCare+ on the machine, anyway, I figure I can get it taken care of later if it really bothers me.
EDIT: ok, it's starting to drive me a little batty. I *think* I can see a *very* subtle tint in the lower left corner of the screen when a) Night Shift is on, b) when the brightness is at all lower than max. Since it's only noticeable with Night Shift enabled, I'm not sure what I want to do. I can't justify giving up near-zero backlight bleed and zero-dead pixel count to fix what
might be a non-uniform screen. I even compared it to one of my friends 2016 MBPs, and while his seems slightly better than mine, his more or less had the same "issue". Hell, he didn't even notice what I was talking about either.
I really think my eyes are playing tricks on me by trying to see an issue that may not be really there. How I wish I was blissfully ignorant to these sorts of things.

EDIT 2: Thought it was weird for it to look uniform when Night Shift is off, so I turned off the screen for a moment to look at it. Sure enough, I found finger smudges in the exact spot mentioned above. Combined with the installed screen protector, the prints probably make it *look* tinted when its actually not. This would explain why it looks non-uniform with Night Shift on, but ok when off. I'll wipe the prints later tonight to see if there's any noticeable difference.
EDIT 3: Tried to reproduce the fingerprint patterns noted above on my MBA's screen. Did it in the exact same spot, and saw the same, subtle tint. Some more testing with f.lux (as the machine doesn't support Night Shift) showed the exact same effect I was seeing on my MBP. I bet if I put a matte screen protector on the MBA and run through these tests again, I'll get the same results.
This tells me that the oils from our fingers, fingerprints, and other smudges can produce the dark or warm tints seen in normal use. Add the matte screen protector into the equation, and there definitely will be more wacky variations in color uniformity. I further confirmed this by looking at my iPad Pro, which also has a matte screen protector. An inspection of the screen revealed some tinting caused by "stains" in the screen protector itself. The tinting
mostly went away after cleaning up these spots.
Wiping the screen down is, of course,
NOT the simple, end-all-be-all solution to what is effectively a larger problem. But I think the findings above show a possible variable I myself didn't even think of. If you notice non-uniformity right of the box, that is
obviously an issue for Apple Support to deal with. But if you notice non-uniformity where there wasn't any before, give the screen a clean and see if that resolves your issue. If it doesn't, it is, again, an issue to take up with Apple Support.
I hope these findings will be helpful.
EDIT 4: Just got home tonight, and Night Shift is on. Made a mental note of the severity of the tinting, and wiped the spot down. Lo and behold, its a lot better than before. I think my eyes and I can rest easy now.
