Noticed the same thing.
Anyone but me disappointed that 5.1 audio is only for "certain" VOD feeds? Guess that's not a big deal if comparing to PS Vue as it 2-channel but coming from U-Verse which is mostly 5.1 audio, stereo audio is pretty unacceptable, particularly if I were paying the $50-60/mo tier.
I dunno. At this point I would rather have them just work the bugs out and get all channels playing correctly and consistently. Then move to offering DD on a channel by channel basis.
We are beta testers right now. I think that has a lot to do with the Apple TV giveaway. No way can I make this my primary source of TV just yet...but close.