In Manchester City he has shown an extraordinary contribution by bringing Manchester City to win many trophies, now he has officially left City and joined Napoli. I think Napoli gets the best and better quality midfielder to boost their strength. But behind Kevin De Bruyne joining Napoli I think Lukaku played a role in persuading him to accept Napoli's offer because both players come from the same country and now they are on the same team.
On the other hand, Napoli is predicted to be much stronger compared to this season, especially since they managed to become champions last season, of course their enthusiasm next season will be much more fiery. Conte has succeeded in bringing Napoli back to being stronger and maybe will be more ready to defend the title next season.
Kevin De Bruyne was a great guy in Manchester City and he have really helped the club to win a lot, his absent don't make it comfortable for fans and almost all the players anytime he was injured. Honestly truth be told Kevin De Bruyne is a great player who also lifted any team he play, both home and club side. His departure from Manchester City was so painful for because they don't have player like him, I hope Pep find his replacement to keep up his good job, both will means each others.
This will be a great advantage for Napoli to have signed Kevin De Bruyne because I'm confidence that there will never regret signing him. Napoli will definitely be stronger next season if they can still have enough striker because Kevin De Bruyne at arrived to bring good passes and also assists, this time around I don't expect them to have less goals, last season Inter Milan and Atalanta scored more goals than the champions, this doesn't mean but not good for a team as Napoli.