I'd like to play both if possible and yea I don't think Del Piero would be really happy with that but he's not getting any younger and we should start looking for his potential replacement ; the ideal answer would be Cassano. His talent is unique really and I think he would fit-in here very good. The most important thing would be his attitude, it's not the old Cassano it seems, we see no new problems but his form is

I would be really to change formation for him again next season too, instead of 4-3-1-2 I'd go with 4-3-2-1 with him and Diego behind Amauri. That way maybe even Giovinco would get to play more and it would be perfect since it seems that Trez is on his way out.
Diego-Cassano
Amauri
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Giovinco/Diego-Cassano
Iaquinta
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Diego-Del Piero
Amauri
Our attack would be a lot stronger, Cassano would provide creativity and passes that even Diego is not capable of so our striker would be unbelievable service up-front.
new mc
new rb/cb
Cassano
It would be perfect mercato but it doesn't seem unlikely, we'd have some money from Tiago/Poulsen too. Inter is also after Antonio, it's our last shot if we want him and that move would give Secco status of a world class.