I think that is kind of harsh Brwned, imagine if Scholesy was put on the wing for United .. as he was for England, He'd have struggled to be effective and play his natural game. Certain players have the skills to be versatile, having pace, tackling, an eye for a pass and dribbling ability helps to play in a number of positions.. but when you lack something like pace, your options become alot more limited as a player.
For me the reason why Kagawa lacks the 'balls' of Januzaj is that Kagawa knows he can't beat men around the outside, doesn't have the pace or the strength. Does that mean he's shite? well possibly no, it means he's better off playing in a central area where he is more unpredictable, can go either side of a player and pick and choose his moments when to dribble. Januzaj is a better player but he's got a superior skill set and the right physical attributes to boot... hence why he could play in a number of positions.
If Kagawa is played in the hole and he is helpless when we're struggling, then I totally agree.. he's not a United player - simple as. He should be given the chance to demostrate that though because on the wing he is not of the required quality to play for United.