de sciglio was actually a great talent at milan. too bad injuries have ruined his career and he's been struggling for continuity for years now. still, he was quite a talent in his respective position, similarly to bernardeschi, immobile or ranocchia (and the list goes on). either mental midgetery or injuries hindered their progress, and only immobile managed to become the player he was destined to.
At least he is there so that Alex Sandro won't feel like he has a free ticket to the starting eleven so he can just show up without giving an ass into making an effort.