Finally bought one S8+ today, from Samsung store.
No red tint issue. And yes, The edge got some blueish and greenish tint, but when I pusing the phone around, it will disappear. So ya. Confirmed it's a reflection.
Surprisingly, they accepted trade in of my 1 & 1/2 yrs old Note 5 by offering RM1000, which is higher than the price tag stated on their trade in website. I am lazy to find another buyer in such a short period. So the trade in offer is good enough for me. Inb4 if someone say it's my loss, well, frankly speaking, I don't really care.
Everything finished setup. First impression. Smooth and fast. It does have some small hiccups here and there, but it's hard to notice. I also had that kind of issue in my Note 5. So not a big deal. First time using edge screen, I feel so weird. Need some time to get used to it. LOL
Tomorrow will buy the official Samsung casing. And start my S8+ journey.

I guess its your lucky day..