Adding huntelaar won't fix the fundemental problem at the club right now. This problem is obviously creativeness coming out of midfield.
If a 4-3-3 was deployed, Camoranesi would have to be on the right flank, as we would need a better two way player next to the other two midfielders. Those being Nocerino and CZ. So that would still leave the left flank for one of the Iaquinta, Del Piero or Palladino. If Giovinco returns, where does he play?
I'm all for having Huntelaar in the squad, but I think some sacrifices would be required. Nedved retiring (most likely anyway), Del Piero being a bench player, Palladino possibly being a winger taking over Nedved...Giovinco being a playmaker and Trezeguet and Huntelaar sharing that striker position.
Another aspect to it all is if we do make the CL next season, then we do need rotation and we could fit both Trez and Huntelaar in the squad.
--------------Nocerino----CZ--------
Camo----------------------------Giovinco/Palladino
----------Trez/Hunter--------Iaquinta/Gio/Palla