I can vouch for the awesome button and plate swap! I have the 8 Plus as well and am rocking the Rhinoshield case for that phone too. After having bought two dozen or so cases for the iPhone 8 Plus, I've come to the conclusion that the Rhinoshield Mod case is my absolute favourite of them all. I've yet to buy the camera mods, but will do so very soon.
Anyhow, here are two images of my 8 Plus case with the red buttons.
View attachment 746919 View attachment 746922
Thanks for the pics. They look more burgundy than red on the website and your pic. Would you say that’s true?