Walter Mazzarri is trying to repair the mistakes made by Rudi Garcia, it's not easy to fix something broken, especially if the team doesn't have a strong character and can't resist bad moments, as Napoli are experiencing now
This remains a very difficult thing to do, to rise from the ashes, but to be honest I have seen an improvement. Obviously we can't expect him to fix everything right away, he doesn't have a magic wand.
I agree with you. Walter Mazzarri tries to correct Garcia's mistakes. But we don't know yet whether he will succeed. And so far Walter Mazzarri has not even been able to stabilize the Napoli team. Defeat in 4 out of 7 matches is not a good result. And against Barcelona, Walter Mazzarri will solve all the problems of the Napoli team, it seems less likely. For these reasons, I cannot consider the Napoli team as a favorite in the match against Barcelona. Walter Mazzarri needs more time to strengthen their squad. At the same time, Walter Mazzarri will be looking to strengthen the squad by adding players of his choice to the squad. It is definitely time consuming.
We are going to see it until the games start, there are a lot of Serie A games that will happen before the UCL game, so we need to wait and see how it will go. If Napoli looks as good as last year with the new manager then we can say that it is going to be fine, but that's only true if we are talking about a clear cut deal, that has to be something that will change a lot. Of course, if they end up not that great for not that long time then we could consider that as nothing that important.
I believe that it is going to be quite important and we need to end up with something careful in the end as well. I hope that we could achieve something that needs to be a bit more proper and better in the end and before the game we will see if the new manager is good enough to win UCL game too.