Red Army wasn't really big at all, in my opinion. It's only the activeness of the forums and Soviet's thread's about its roster that made it seem like they were a big deal, even to the point in which he added players to his "roster" without those particular player consenting to it.
I also don't see Team Eye as a faction either, as Mabz said, they just seem like friends who want to fuck around in the server.
There are no current "powerful" factions, and in terms of priority, adding a separate scoreboard for different factions is at absolute 0.