We can see from the start of the season Juventus have really start after their non pleasing performance last season even though they finish 4th in the table why in the other side Napoli is still looking like a dangerous side that want to still win the Scudetto this season but there is more competition as of last season that they won it, in the other side Ac Milan and Inter Milan have already drop three points each in the table which is a very heavy point that they drop that might hinderance their sight or fight for this season Scudetto. Cremonese and Roma looking like a side who want to compete for the Scudetto this season but it will surely be a difficult one for them.
Juventus are one of the best I have seen in the Serie A and that's the more reason I'd always feel bad when I see them not doing well or if there isn't any improvement in that team, like their past stays in the past which has to be and is time to start all over but you see these set of Juventus players, they lack so much in that team and that's why they can't be seen as part of the team to compete for the title. Last season they could not keep up the force in getting close to winning the title, losing important games reduced their point, instead of gathering points to stay close to Inter and Napoli, they dropped point which made them finish 4th and it wasn't something to applaud them for.
Napoli are not yet done with what they did last season and they are coming with something highly different from that of last season, a better team they have now and with their game plan I believe they can get close to winning it again. Ac Milan and the other clubs you mentioned are not yet their, the position or how they played doesn't tell if they can compete for the prize ahead, lets watch and see how they'll play till their 5th game, if it will be impressive together with the point they'll get.