How do you assess the good side of Rasmus Højlund before coming to Manchester United ?? as far as I know he is a striker who is not very productive even since he was at Atalanta, Sturm and Copenhagen so I think he is not a quality striker so I think it would be a loss if Napoli recruited him it would be better for them to keep Victor Oshimen because he is more productive and he is suitable to play at Napoli but it all depends on the coach's decision only the coach has full control over the club he built.
Højlund was not like Osimhen or Lookman when he left Atalanta and joined Manchester United and several years after that transfer, he was not able to upgrade his performance quality and career at all. He left Atalanta with hope that finding a new chapter for his career as well as achieving success in Manchester United but he did not perform well individually while Manchester United as a team have had many big problems recent years.
From talent, physical strength, ambition and mentality, in general Højlund seems to be worse than Osimhen and Lookman. Now, his adventure in Manchester United can be considered as a failure while he already wasted some years there. Failure in Manchester United makes Højlund becomes a less attractive player than years ago when he was younger and considered as having good potential of growing up more.