This is a great share. I like how much of an impact Kagawa has had even with such limited time against Olympiakos. What this video is telling me is that DM's tactics have in several occasions ignored Kagawa and that is not a coincidence.
Could this be down to
A. His United team mates are short on confidence.
The vision and technique must be spot-on to find players like Kagawa who likes to find space in tight and narrow areas, and we all know United players are more than capable with their ability to execute that, but is it the confidence factor that has restricted Shinji from getting the ball because the morale of the players are not allowing them to do that.
B. DM's cautious tactics
I think DM is very afraid of being exploited in the midfield area, knowing that this has been the large part of United's weakness this season, such that a mistake, or loss in possession in midfield would force the opponents to overrun and dictate play. So, he had to resort to spread possession out to the wings, which with the one-dimensional Valencia and increasingly uncreative Young, United always have to resort into aimlessly crossing balls in and expect RvP to perform a Peter Crouch.
C. Lack of a Paul Scholes character
In the previous season, I remember watching a clip from SkySports showing statistics on the interchanging of passes between Scholes and Kagawa in a league game, and the pundits likened the figure to that of Xavi and Iniesta. For someone like Kagawa, he needs someone behind him to link up play, which unfortunately for Rooney, the only capable United player at the moment who knows how to keep possession, is being forced to drop deep and strand RvP all alone up top.
I am not trying to defend DM's tactics but I think in cases A,B,C it becomes eminent that the immediate solution in the summer would be for DM to sort the midfield ASAP. Carrick has been under-par and missing for most parts this season, Fletcher is still working his way from recovery, Cleverly is turd (I see he's trying hard but he's simply not good enough), Fellaini's contribution is yet to be seen, Anderson might as well stay in Italy because he's turd as well. We need the calibre of Gundogan,
Pogba, even Yaya Toure for all I care to come and plug our extremely leaky midfield, because we need our main man Wazza up top with RvP to win games, not drop deep and play alongside Cleverly in the midfield.
Sort the midfield = Kagawa will be back at his best.

United would have a good goal scoring anchorman in the midfield if it wasn't Fergie who decided Pogba's future.To me,Pogba has PS love of scoring goals,just he sit abit deeper (Scholes was a second striker early to mid career was he?) than Scholes i think.Well technically,United need to sell Cleverley,Anderson,Young and Nani.Maybe around 50M in total?
Moyes better start playing Jesse Lingard next season..