You have mentioned a handful of clubs, most of whom would be very demanding of any loanee. They are not going to give someone like Diaz a bunch of games to adjust. He would have to hit the ground running immediately, or be benched, or even stuck in their reserve team. In the case of Brandon Barker for example, he did absolutely fine at a middling team & still got benched, which has even happened to Zinchenko in Holland tbf, he's barely put a foot wrong & been one of the best players when played, can't get on. When kids have done everything asked of them, they have had no reward. Jack Byrne outperformed some big names over there & we sold him without even one first team game as reward. Denayer comes back from Glasgow one of the most rated kids in Europe & ends up working for Moyes two years later, again without even one first team game. Marcos Lopes did well in our team, did well on loan, sold. Playing every week in France. Not good enough to be a sub at City. Those kids would each have five/ten games at the swamp as it's good for the club to promote your own players over signings whenever possible. One or two would probably be playing tonight.