I've been using the new beta for about 24 hours now. I don't purport to have any knowledge regarding app development, but I thought I would at least offer my thoughts.
I've always been a power amp fan because of the equalizer and the ability to assign presets to a device. That said, I'm getting a great deal more distortion since upgrading and I can't figure out why. I don't nearly max levels, and I've had to tune the preamp drastically low.
Also, as a side note - many more bluetooth devices these days. Is there any possible way to eat the ability to assign one preset to a pair of h