When playing through the middle, Wilshere sees a lot of the ball. That's natural -- his preference is to attempt to dribble the ball first, then pass, and for the most part that's okay. It's not necessarily "selfish" or anything like that, it's just his style and that can be useful in a team. It also has the effect of sometimes making Wilshere look like he's playing well simply because he's seeing the ball a lot, and most of the things he's trying are coming off. It's a less subtle way to have an effect on a game than
others might have.
It can cause problems, though. Spending too much time on the ball can take the rest of the team out of the game. It can cause stagnation, and reduces the variability in attack that I talked about earlier. Everything slows down, you start losing the ball deeper and deeper in your own territory, you get tackled and can't defend the counterattack...all in all, bad things happen.
