I wouldn't expect that somebody would have all 7 channels using active crossovers - I don't even do that. However, with the two main channels which are used for music reproduction, every little bit of elimination of circuitry which is going to muck up the sonic quality is going to help toward the end. Believe me, home theater preamps are a virtual maze of buffers, coupling caps (cheap electrolytics) solid state switches, more buffers etc, etc.

Eliminating as much as possible of this does help. I could give you a very convincing demo of what elimination of unnecessary circuitry and optimization of the remainder can do toward the goal of best sonic quality.