From what I remember, Sanchez wanted out the summer before but there were no concrete offers. I guess his agents then upped the ante and made sure that didn't happen again. There's no doubt in my mind that Sanchez would have been 3rd choice in Ange's system.
Davinson didn't want bragging rights over Dier and Davies though, and just be a 3rd choice. He's been a mainstay at Galatasaray and has 1st team football including CL games. Worth remembering that Dier also saw the writing on the wall but was blocked from moving in the summer. If the same thing had happened when he was 26/27 you just know that an amazingly strong character like Eric would have forced a move. Emerson is also a strong character and my hunch is that his entourage are already planning his next move where he can be a first teamer.
RD has said this a lot, but our mistakes have been around contract extensions. All 3 of the Sanchez, Dier and Davies should have been moved on. Skipp and Hojbjerg fall into that category right now as well. We must not dare let them outstay their welcome when they're not up to the job.