Sometimes with a new coach, you don't necessarily have the opportunity to work as hard as last season. Napoli were good at the end of last season because they managed to dominate the Serie A with a wide margin of victory points; no other club could be like that, meaning that Luciano Spalletti has made the best contribution to Napoli and they should have kept him because Rudi Garcia may not necessarily be able to give them victory like last season.
I seem to disagree with your opinion which states that other teams cannot set a record for the title with a wide difference in points with the team below them. This could happen or be done by other teams next season if they can take advantage of each game consistently then they will be able to achieve this at the end of the competition. Coach changes often make a team lose their best form if the coach fails to implement a style of play that is acceptable to their players.
Napoli, Juventus and AC milan and even Inter milan will struggle next season in the race for the Scudetto trophy. I think we AC Milan have the opportunity to reach the Scudetto trophy next season because they are very strong at this time if we look at it from the point of view of their game against Real Madrid. I think Pioli just needs to step up to more aggressive scouting in terms of their game next season.