I've been watching this thread from the beginning and I think it's the room.I think you're getting a lot of echoing and cancellation in the lower mid section. In the A/B video, the LaScalas do sound better. I believe that with some nice, white, sound absorption panels, things would be different. I've owned 3 pairs of LaScalas (original), and the only time they sounded "right" was at higher levels with a lot of sub. They're fun and look cool. I found that 95% of the time I used the main system it was at lower volumes. For critical listening, I've moved over to conventional bookshelves with dome tweets that can handle some noise when needed.
I have abandoned separates and Audyssey. 2 channel integrated with bass and treble only. Find the right speakers and you can run it almost flat.
I ran over the thread a few times and maybe didn't notice if you had changed your source completely. Grab that old receiver in the extra bedroom and hook it up to your phone or and old cd player. Run that and if it doesn't sound great, it's the speakers or the room. Not the networks.