I took the second Pixel 2 back for a refund. Disappointed as I really like everything apart from the screen.
I had a play with a bunch of Samsungs in a phone shop. A number of them suffered to a greater or lesser extent from blue shift. This didn't, however, cause me problems. What I realised with all these phones is a white background looked "flat" like a solid slab of colour. When tilting the phone the white shifted into blue but it still looked like a solid colour.
The Pixel 2s I had suffered relatively little blue shift compared to some of the Samsungs. The problem was when viewed anything other than directly perpendicular a white screen didn't look solid. It was shimmery, inconsistent and fleeting in a way that I can't describe. It prevented my eyes from settling and relaxing while reading. I also noticed, when compared to the Samsungs, the screen lost its sharpness/clarity when viewing text/icons at an angle.
When viewing pictures or video the problem isn't evident at all. I expect the next owners of these phones will be happy with their purchase if they don't use it for reading books.