Highly debatable and based on Mata's united form,not true at all. Di Maria creates chances no mater where he plays except when he played up top. Mata doesn't. That's the long and short of it.
And it is nonsense. Januzaj has played one game at AMC, one fecking game. As for how AMC performances shouldn't be so poor for United, seeing as Mata has played more games there than any of the other names you've mentioned, he's also the biggest culprit of why those performances have been poor.
You cannot judge Mata and Fellaini purely on stats like these because the way they play the roles are completely different. Rooney has more assists from open play, more through balls per game, more key passes per game, more goals and this despite playing deeper than Mata and out of position for most of the season.
@the bit in bold. Very good. And how many of those passes has Mata made this season? Actually scratch that. How many of those passes has Mata played in his entire United career? Very very few I'd imagine and almost none this season. Almost no one else? Rooney has played more of those passes this season this season than Mata has for a start. Even Januzaj has played a couple of nice through balls despite being played everywhere but as a #10.
Another advantage of having Rooney, Herrera or Maria instead of Mata is they are less likely to disappear from games and provide a lot more defensively while not being any worse going forward.