Even with those 15 points they lost they still wouldn't have a chance against Napoli this season is my guess. Juventus just isn't performing well although they have some big names on paper. They wouldn't even be close to Napoli and this is what was a bit unexpected before the season started. They would be about as good as the first four. They would actually be fighting hard for the first four ranks and that is not enough for a team that should usually have enough drive to for the top. It is overall a bad season even if you don't take the deducted 15 points into account. It is not over yet though, but if they want to get the best out of this season they should beat Nantes now. This would be bad if the big Juventus Turin also loses in the first knockout stage of the Europa League.
That's true, adding 15 points to their current situation proves that they were far enough, and even with psychological issues seeing that points gone, if we add even 10 points more, they are still not at the top, that should alone be proof enough that we are not going to end up seeing them do much this year.
I am not expecting much from Europa neither, yeah they really need it, more than any other team here right now, but needing it is not equal to winning it and they will suck for this season. They better start working on the next season so that they could do a better job and be good both in the league and if they could somehow go into something else, be good there too.