I don't get your point.
These numbers show a pattern of a malfunctioning judicial system (acknowledged by the italian courts themselves) that tends to produce abuses of human rights. The system didn't change that much throughout those years (as can be seen from the 2011 statistics you mentioned, for example).
As a result of this conversation, I am wracking my brain, and scouring Google, for the piece an American wrote on the changes in the Italian legal system. It was not about the Kercher case, really, but it cited the Kercher case for how the system there is midway from moving from a full fledged inquisitorial system, to the hybrid it has now.
Apparently, and I'm doing this from memory (so take it for what it's worth) - the intent is to move Italy to a full fledged adversarial system... but the reforms got stuck in the 1990s.
My read of it - wasn't the author's point - is that it left a system with way, way, too much power in Public Minister's (prosecutor's) hands. One of the examples cited was the times that prosecutors can take theories into the courtroom, and have them evaluated as "expert theories" without much evidence supporting them. It seemed to me at the time like a doctor being recognized as an "expert witness" and thus having their opinion given better weight than someone else. She cited potential abuses for the prosecutor being recognized by the court as this kind of "expert", when those sorts of things should be left to those who actually give testimony....
This author's point was not that the Italian system was "malfunctioning", she used a different word. I am now going to have to find it - because her point was having what is essentially a hybrid system - also with the obvious judicial abuses that Italians remember from the fascist years in mind - Italy faces unique challenges in further judicial reform.
I seem to remember that as far as the Kercher trials were concerned, she was mildly an innocenter - but she wasn't writing to make a point about it, but about the system in general which produced unique "miscarriages" of justice, while still, in the main, functioning adequately.
But I'm also reminded of the people on the US News networks who comment on their own experiences in trying to do business in Italy - and I admit it is also in the context of the ISC ordering a re-appeal's trial. Gloria Allred is one who simply refuses to do business in Italy after some bad experiences - available in a Google search.
She did not say it directly, but she echo'ed the sentiment made by others - why risk doing business in Italy when the most minor of legal-squabbles can tie you up in court for years, and cost amounts of money completely out of proportion to the original offence?
Of course she was not referencing the Kercher tragedy - but still.... even the most cynical guilter has to agree that it's a very real possibility that the Florence court could re-acquit, only to have the ISC order a fourth trial in 2016.
You don't need to go to the ECHR stats to discover what's wrong with this picture. Word of mouth, like the movies, is working just fine when it comes to Italy.