Napoli seems to be making good on their word of improving the squad. I am sure they will just want to stay at the top or near the top, so that they can keep on getting better long term. If they can stay at the top 4 teams, and go to UCL every single season, then they will certainly have a lot better results.
So if we can see Napoli use these players being as consistent and play together well, and the new ones do not have any issues then we could see this be a very good season for them. It is not going to be easy at all, and will take some time, but we can certainly see this being an important help for them. If there are no more issues to left, then we could definitely get a greater result with time. That's an important subject.
Conte is a very peculiar coach, he always demands new transfers, in fact, most often he has conflicts with the management precisely because he does not get the players he needs. But last season was good for Napoli and therefore his demands are listened to, especially since they got De Bruyne and I think that this will be a huge plus for their midfield, Kevin is still capable of playing at a high level for several seasons. Now Napoli has made a transfer offer to Sevilla for defender Juanlu Sanchez, so they also want to strengthen the defense.