Playing the beta with friends last night, we noticed a few things. I'm a mute, so I don't use a headset, instead letting voice come through my speakers. Well, I couldn't hear the party chat channel without having the party snapped to the side. Unsnapped, all voices were muted. Further, when my friends went to gamechat without leaving the party, it caused a massive "echo" effect.
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Put this in the feedback section.