I am reporting these letters
La Scala's acoustics: what a disappointment!
http://www.giornaledellamusica.it/lettere/?id=113695
Then on the internet, I found a recent study conducted by the University of Parma on the acoustics of the Theater, which confirmed a "deterioration" of them after the renovation. Also in a 2007 forum on the Operaclick website (regarding a La Scala symphonic music concert), an impression was reported that was practically identical to mine. All I know is that I had planned to go hear Barenboim's Götterdammerung, but at this point I think it's better if I enjoy it at home. I wouldn't be able to bear another disappointment (especially with my beloved Wagner...)
In the forum they were talking about "disappointments"...