Regardless of the system Gasperini chooses, we should absolutely sign a defensive midfielder, a deep-lying playmaker (I have been claiming this for 3 years but my wish hasn't been fulfilled yet) and a winger/wide-striker. I would also sign a left full-back, Nagatomo is good, he overlaps a lot, he has stamina but he lacks defensive awareness. Unfortunately the market, especially the Italian one, doesn't offer too many opportunities and it's better not to look at players from other leagues, we simply can't afford them.
so maybe Pizzarro or Pirlo? :nonva