Wilshere to me seems like the kinda guy who can control a game better than Ramsey can, his diminutive stature means that he has more mobility and can ride challenges better than most footballers, If he is able to add something else to his game, be it developing his shooting boots, or to be able to pass and dictate a game to a higher level you've got a player on your hands.
He also needs to improve defensively, he goes full blooded into challenges and more often than not comes worse off. Maybe if he bulked up a little or he was a bit smarter in going into challenges he will improve that side of his game.
I feel Wilshere basically needs to improve his attacking side of the game and his defensive side, as an Arsenal fan looking at who you have as midfielders I'd be more inclined to make Wilshere play a more defensive role. Ramsey has put the no.8 position on lockdown, so I'd probably put Wilshere as a no.6. Reckon Wengers thinking is to use Wilshere deep, he's always said that he sees Wilshere as a deep lying playmaker anyway. Remember a point between october 2012 to february 2013 that Wilshere was controlling things, that's what I want to see from Jack.