Del Piero, or Del P as he is called sometimes, is one of the best strikers/midfielders in this game. He can play anywhere in the attack and he will score goals for fun. IMO he is not the best as a lone striker but in a 2 striker formation he will get the job done. I prefer do use him as a left cam or as left striker in a 4231 (playing left cam) or a 4312 as a left striker.
Del Piero is therefore one of my favorite attacking players this year and the only other players that has blown my mind as Del P has done is TOTY Neymar, CR7 and possible Ibrahimovic.
Keep in mind I play in Div 2 in rivals and I finish elite 3/ elite 2 regularly in Fut champs. Before Del P I was an Gold 1 merchant but he has turned me into a elite player.
Aerial threat (since he is not very tall)
Possibly price if you don't have the coins