4. Quality Midfield
Lucas Torreira had a great World Cup with Uruguay and is now set to start a new chapter of his life with Arsenal. He is the kind of player Arsenal need at the moment.
The Uruguayan can play anywhere in the middle of the pitch. He is quick, can dribble the ball, and has a decent vision. He is also very good at interceptions, taking set pieces and shooting from distance. Unai will probably use him as a CM because Xhaka is firmly established in the role of a CDM.
No qualms on Ramsey being benched because of Torreira as the Welshman is a consistent performer for the Gunners. His ability to contribute to the attack is unmatched as he is quite good at creating chances and finishing them. He is one of the most important players for Arsenal and is absolutely reliable.