Overall this season there are not many changes to the Napoli squad they just released 3 players and brought in 3 players as well and Napoli can try it in pre-season matches, I don't see any mental constraints on them except on strategy because Napoli has a new coach so at least he has to understand the character of his players first it may take more time. If we monitor player transfer activity in Serie A, it seems that there are no competitors who are strengthening their squad instead most of them let go of important players as we know, financial problems are the main factor.
But this is where the primary difficulty remains. In my perspective, selling three players and replacing them with another three is not a problem for them. However, the new coach they've recently employed is the source of the problem. He needs to put these players to work and be ready for the challenge that awaits him next season. I wouldn't say he has a limited time to achieve it, but the big question here is how quickly he can build a competitive squad. With Napoli having just won the title, I have no worries they will do well by next season. However, if they sell more key players, it may be disastrous to the team.