Now look, I know Azzurri7 and all the other users that love Del Piero think I'm a DP hater but I'm gonna take my chances and present these stats I just saw. You guys can read into them in anyway you want.
Basically, these are stats of how many points the team gets with those players playing.
Camoranesi 36 points / 19 games 1.89 Points per game
Chiellini 44/25 1.76 PPG
Buffon 37/21 1.76 PPG
Iaquinta 14/8 1.75 PPG
Sissoko 24/14 1.71 PPG
Giovinco 20/12 1.66 PPG
Melo 36/22 1.63 PPG
Marchisio 31/19 1.63 PPG
Poulsen 29/18 1.61 PPG
Amauri 35/23 1.52 PPG
Del Piero 16/15 1.06 PPG
I have something for you:
Giovinco: 1 goal+assist every
366.6 min
Amauri: 1 goal+assist every
301.7 min
Caceres: 1 goal+assist every
292.2 min
Diego: 1 goal+assist every every
188.1 min
Camoranesi: 1 goal+assist every
191.5 min
Candreva: 1 goal+assist every every
166 min
Trez: 1 goal+assist every
145.8 min
Iaquinta: 1 goal+assist every
126 min
Del Piero: 1 goal+assist every
112 min
Go ahead with your objective observations. Del Piero is our most efficient player so far this season.