The sound quality is still poor ,the 5~1 mix has no dynamic range at all,so you have to choose the Stereo option just to hear the dialogue.
That's probably either the content, the streaming rate or the home platform. Some Netflix shows are the best sounding TV have ever heard. For example, the intro to Netflix’s House of Cards using a Chromecast over a high speed internet connection sounds spectacular. Using a PC browser is not nearly as good due to the downgrading of the sound format for that platform. Some platforms limit video quality as well, as has been reported by users of Netflix on Fibe boxes.