Well, Giovinco is so skilful that he actually gets to those chances in the first place. Usually he's a huge part of the chance he actually ends up missing.
Gio offers so much more than goalscoring which Quag for example doesn't, and to be honest, Quag ain't no poacher so its not like we're missing out on Trezeguet finishing ability.
That's the whole point. We already have somebody who offers so much more than goalscoring, and that is Vucinic. He not only has greater agility and finesse, he also has much much greater physicality which makes him pliable against all sorts of opponents. So we don't need somebody to do the same thing in the final third. We need somebody to convert those created chances.
Quag may not be a poacher, but factually he remains the only one returning with the kind of stats that suggest he's the closest thing we have to one. And on top of that, he actually has some ability and finesse to go with the finishing, which makes him a better choice, for a more complete attack.
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Quag doesn't have the same amount of playing time because Conte doesn't think he deserves it.
Quag had almost certainly benched Giovinco, till he lost his cool. And besides, it is hardly an argument because the same Conte who according to you prefers Gio, preferred Borriello last season. it's not the talent that's in question. It's tactical issues, which is what is adhered to. And as the season progresses, you'll see Quag will make an impact. Gio has hardly suggested himself to be a world class exploit with all the opportunity he's gotten. I'm a fan, like you, but again, there is nothing in Gio's reportoire except your bias to suggest he's more of what we need.