As with many other war games (most?) the FPG engine, IMO, excels in head-to-head or pbem gaming. Then it works more as a "tactical simulator", as a friend accurately pointed, than just as a game. Naturally as its release is so recent, there is not a strong community around it yet, as it happens with TacOps, Combat Mission and, last but not least, SBP. But with the continuous and efficient support from the designers, I think that that will come soon.
FPG is a great game, but believe me, playing it against another fellow human is still better!