Oh my, she has a face that breaks cameras, eh?
I'm sorry to hear of your phone troubles.
About the pink...did you just not really notice it before or did it simply just happen when it had previously been normal? I've had mildly off color displays before, but as long as they are evenly off-color I pay it no mind.
I do imagine everyone wishes I'd honor my promise to shut up about it, but this pink display issue on the S8 is one of the strangest things I've ever run across since my IPhone 6 Plus gave me all around peculiarities I was never able to define and solve.
When I say strange, I mean it's hard to define what's going on, describe what exactly it looks like, and completely impossible to photograph. It's just an all around pink iridescence, appearing as a frame in the Adaptive display mode with now a hint of blotching across the Adaptive display, and spread across the display in the other modes. I find it impossible to say it's worsened, gotten better, or what, because it is so inconsistent in when and how it manifests. It persists in all states, but it varies in how it will show up in apps and pages to distract me. My husband and I were texting to arrange his sister's birthday dinner and the entire conversation took place amongst pink sparkles. I know I'm not making any sense but it's really hard to describe.
It's actually quite pretty, but goodness, I want to enjoy the contents of my display, not the pretty show of the display itself.
Meanwhile my fingerprint reader works ridiculously well after barely working at all the first couple of days I've had the phone. Again, I'm mystified but grateful that is the case. I do think my S8+ is possessed by pixies...hence the pink sparkles!
I'm not too worried I'm just seeing things because there are a couple of discussions on Android Central where a handful of people report precisely what I'm experiencing, albeit with even more colorful expressions like $900 acid trip.
Well, back to the grind...I do wish you all the best in getting your phone exchanged.