Of course Amorim don't need to be judged with his performance this season. If we look at sporting Lisbon where he bought the players of his choice, we can clearly see that he did very well there.
To add that Amorin did not make Sporting strong overnight, it was not in the first season that he arrived that he made Sporting strong, in the first season he began to organize the Sporting squad well, he stayed for 4 seasons as Sporting's coach, this allowed him to create a good team and that is what Manchester United needs, they need a long-term coach, someone who organizes the team and stays with the team for many years, something like 8 or 10 years.