Regarding de Jong, remember that it's all about the narrative.
Pay no attention to the "Goodbye seems imminent", which is coming from AS. The story from Mundo Deportivo (see image below) is more pertinent.
This is from Edu Polo, so this is reliable, but keep in mind that he'll also push out whatever Barcelona tells him to.
Edu Polo reports that Barcelona can't even register both Kessié and Christensen (despite announcing them), so selling de Jong will help them to some extent. Barcelona's execs along with Xavi have invited de Jong to evaluate United's offer. Despite that, de Jong doesn't want to take the fall for Barcelona's financial issues and still wishes to stay.
We'll see how long that lasts for. Meanwhile, both Arnold and Murtough left Barcelona in order to seal the Martinez transfer in Amsterdam.