The scorers were not showing their true potential. It's not important now but, it'll proven to be crucial next season when you're playing in UCL, Serie A and Copa Italia.
The intensity will rise when your players are getting tired and suddenly the team work isn't fluid as it was. You need a player that can create something out of nothing in order to survive 40 to 50 matches next season.
Look at how Messi, Ronaldo, RVP, Falcao, Ibrahimovic, Valencia, and many more reacted when their team was tired or they're tactically nullified.
Giovinco is something like that, same goes to ADP but, he's getting older, so I don't think he can suffice any longer given the pressure you'll be facing next season.

EDIT: Giovinco is on loan iinm, yes?
giovinco is co ownership between both club.