Yes, you are right. Amorim has been known for developing young and talented players from the academy to build a solid squad. At this stage of his career in Manchester United, I really don't think Amorim should focus on youth team players but sign quality players who can help the team improve their title chances. The Premier League is new to Amorim and he may need to change his playing style or bring in new players before United will see the positive changes they want.
I think this one key area I will personally say he shouldn’t change, today he did a rotation in the line up again which to me was bad but he shouldn’t be playing another style and abandoning his own just because he comes a new league. Ten Hag did it and we all know where it landed him. Work with you know best how best to do it