@il brutto He should improve, his level has not been acceptable enough IMO so improvement is foregone conclusion to have lasting use for the club. Question how significant the improvement will be, because you can hustle as much as you want, but if you are detriment to the team in possession as he has been often so far (and his ball winning skills isnt even that impressive, more of a pitbull hounding type then proficient crisp tackler), then it wont turn out pretty.
Not everything is a Bonucci like story, Bonucci's issues were mental focus and confidence related errors, his core quality as a player was allways standout level potential. While Sturaro is pretty much what you see is what you get limited type talent, its hard to see how someone that skillset elevating much, besides improving tactically and mentally with experience, basic footballing skills doesnt take a clear step up when you already 23.