They see his achievements, see KDB's ability as one of the smart players especially on the field, as a creative and smart playmaker to open up opportunities. Although previously at Man City, his performance declined due to several injuries and also internal problems, but now, at Napoli, his role will certainly be crucial, with his ability, maybe it won't be as optimal as before, but it won't be bad. He is a professional player for at least the next 2 years, he is still very valuable and has high potential.
De Bruyne is a very experienced midfielder. And this is why Napoli wants to add de bruyne to the squad. If you are not facing a big injury, Dev Bruyne and Napoli are able to adapt quickly to the strategy, then I believe Napoli's midfield will remain stable next season.
Napoli Serie A Champions this time. But we all saw Napoli's performance was irregular. Napoli will not be able to dominate Serie A next season. This is why Napoli management is trying to strengthen their squad. Experienced players like De Bruyne were added to the squad to Napoli Management Smart Move. Napolir's need now the experienced striker..