The latest patch seems to fix the sound problems as far as the voices getting extra quiet after rescuing Cain, but they still need to make the default music/ambient volumes a little louder, and tone down the voice and sound effect volumes. Funny that i've gone through the beta so many times, and never run into a black mushroom (bound by account apparently) or "The cave under the well", which has some really nice sounding aquatic infused music.
Also ran into some undead unique called something or other the bard (forgot his exact name...I think Bright was his last name) which i've never run into before after rescuing Cain and leaving the cathedral.