Giacc and Nani are completely different players..
Giacc was used to italian football, Nani isn't
Giacc was used as CM, Nani is a LW/RW
we have Padoin, Caceres, Licht and Pepe for the right side of the pitch... only if Nani can play on the left side (asamoah's spot if we need asamoah as CM) this transfer would be good... but i think Nani can't play in a 3-5-2 formation