i think it's important to understand that players like Nocerino and Marchisio and will get smashed by teams like Inter, Milan, Roma, Fiorentina and many more..they have no experience and should only be back up next season.
Maresca would be a very good player as the attacking midfielder for the club. He is able to attack but also defend well in midfield, which would suit DD's tactics. If we dont get Frings, which is dissapointing, then we'll need to acquire a very good DM who can break down the oppositions attacks well. There were rumours of Emerson returning at one stage, but who really knows.
For me having Maresca and Diarra in the middle would be great, especially if we can retain Camoranesi and Marchionni for right wing. All we would need is a good left winger.