I have a Premier, not a Roamio, but:
All of the streaming video providers were wiped out.
Streaming recorded shows from my premier worked fine, with shows description, etc also all showing up normally, if I remember correctly.
I didnt try live tv either, but id be surprised if it didnt work.... though the Roamio seemed to have more problems with the loss of internet from the looks of things on here...
-Premier Xl4 MOCA bridge
-Mini Lifetime MOCA
-Comcast/TiVo Mutant dvrs - RIP
-2x Upgraded Series 2 - Retired