Manchester United hasn't made many transfers yet. They paid a very high transfer fee for Cunha and are currently trying to sign Swedish striker Gyökeres. If the Swedish striker joins Manchester United, Manchester United's offensive line will be much stronger. They need a player of this quality in the Premier League. They had big problems in the forward area last year and struggled with strikers who were not good at finishing. They also need a few defenders.
I think Gyokeres isn't a player who're ready to play in Premier League, he need to adapt and get taught by the coach. It's rare to see Manchester United is successfully train their new youth generation or develop a potential player from other teams.
That's why if Gyokeres join Manchester United, it might ends his career.