Yes, we are now connecting through LAX on the A380.
Admittedly, I'm more familiar with BA but at least the general consensus in the BA forum is that while the hard product on the AA 77W (in particular in C class) is considered superior to BA 744 the soft product on AA is disappointing in F.
I don't care about the age of the aircraft as long as the hard and soft product are acceptable for the service class that you paid for. My understanding is that on the non-refurbished AA 772 this is not the situation.