He's nowhere near the world's best players though and massively benefited from playing in Ronaldo's shadow. Cristiano's fantastic off the ball movement allowed Di Maria to drift into open space all the time and exploit it. As a regular winger Di Maria is nothing special at all and as an attacking midfielder he lacks intelligence and discipline. It's why no one really cared about Di Maria before those 8 months and why he was such a huge disappointment at the World Cup despite coming from a great season. His year at United didn't do much for him either.A very specific role yes but for the worlds best players that role is largely created to get the best from them. Because their best decides 80% of games.
Why do you want to get rid of him anyway if you like him so much? You should be happy that he'll play for United next season.