he's one of the guys that needs a run in the team but can't be given it as he offers nothing whilst he's getting up to speed, which is a shame.
Therein lies the problem. Vela (and other fringe players) need some time to get used to the team in a game situation in order to show what they can do. Unfortunately, they are never given (or take) the opportunity.
While all answers are responses, not all responses are answers.