How about the 5.1 HDMI passthrough problem (DTS/AC3)?
3.5 Can I do audio pass through?
While there are options in the settings for audio types. The answer is no. There isn't support for that currently. We are looking into it.
Ok hope to get it soon

2 more questions:

1) To play from NAS -> settings like this?
Tools → Preferences → All → Playlist → Services and Discovery, and enable Universal Plug and Play (UPnP).
Then go to VLC main menu and click View → Playlist and scroll down to Local Network. Locate Universal Plug and Play and click on it.

2) ISO and other DVD-formats supported too?