Good news (well, for the politicians who run the NWS) -- FV3 won! It will be the new GFS...
http://www.noaa.gov/noaa-develop-new-global-weather-model
Well, I guess they needed to give Cliff Mass something more to blog about... Seems like from a scientific perspective MPAS was a clear leader, but from a political perspective, FV3 was a clear leader for some time now.