Qwiss
It's a tricky one and I guess that's the con of having a big squad players will be unhappy.
If I'm Eze I get the 10 shirt and the 10 is out and they start a 18 year old kid ahead of me when I'm 27, I'd be furious. It's a huge slap in the face. At the peak of your career you demand playing time. Well have explained his role when he signed the contract.
Imagine you're at the peak of your career, brilliant in your field with national awards. And they pop an 18 year old on your desk and give him your responsibilities. How would you feel? When you've all that experience, ability and knowledge and how hard you worked to get that desk at the top.
Whichever way we go we're robbing Peter to pay Paul, someone is gonna be unhappy.
I'd sell Merino he's 29 and does flicks all game to hide that he's got the agility of a scaffold plank. He still has value and he's not elite in any role but he's just about good enough to hoover up game time from everyone who needs it. He's so autistic and he'll just follow any instructions he's given which is an admiral feature so I can she why arteta likes managing him. If you tell him to lean back on a volley he'll just do that the rest of his career. It's a credit to him he's forged out a career as a CB then DM then CM then AM then CF. He can process lots with his high level autism so he can learn a new role 2-3 times faster than the neurotypicals around him. And his quick one touch stuff around the box is another symptom of that, and his processing around duels.
His body lets him down though, he's the least agile midfielder in the league like the anti Salah, and it's only going to get worse at his age.