My experience is that on my sytem (Yamaha Ht amp) the sound with the (raw - closed - raw7.1) rather than the auto setting is audibly superior with better clarity. Not sure why but will be interesting to see what happens when the known audio bugs are fixed as there may be other issues in the audio chain that are involved.
Has anyone else noticed this effect or is it my set up, it is subtle but repeatable on switching back and forth?