Perhaps things might change for the setting as and when FASA 2.0 get their own planned version of the original Noble Armada game engine up and running.
One of the key advantages which A Call to Arms: Star Fleet has is that it's one of a number of active game systems in the same ganing universe. Players can jump from SFB to FC to Starmada to ACtA:SF (and soon, to Star Fleet Squadron Strike) and back again, and players of each of those games can still make use of the Starline 2500 line even if they aren't active here.
Once NA3 (or whatever term it'll be given) is ready to go, there'll be two player bases helping to drive the tabletop side of the Fading Suns setting forward, and two groups of players who could make use of Mongoose's ACtA:NA mini line.
But even leaving the FASA 2.0 angle to one side, there are still a number of major factions to consider (the League, the Imperial fleet, and the Symbiots), plus the array of minor realms out in the independent Lost Worlds lying at the crossroads of Imperial, Kurgan, and Vuldrok space.
I wonder which of the above is the one which Matt is referring to...