Manchester United is scared if they might enter relegation zone if the manager is still Amorim, but they forget that they signed Amorim because Amorim was successful with Sporting Lisbon.
Unai Emery is quite successful with Aston Villa, but it doesn't mean he will successful with Manchester United.
Emery once trained Arsenal, but he was not successful. Manchester United better to recruit Xabi Alonso, Ancelotti or Pep, we haven't see star managers manage Manchester United.
I don't understand why they are considering sacking Ruben Amorim to make way for Unai Emery. We all saw how effective and successful Amorim was at Sporting Lisbon. Sacking Amorim will be a mistake in my opinion, while Unai Emery has done a fantastic job with Aston Villa, if he joins Manchester United without the club addressing its deeper issues, he will likely struggle as well. Without structural changes no manager will succeed at the club.