In order to make FCP work, you need players with really good stamina. Otherwise, you can get burned by wearing your own players out. I would also expect that FT are important because you get fouled a lot if the other team starts to wear out.
Oddly enough, 2 of the 3 wins you have against me came when you weren't using FCP. Although 1 of those was a game we both played scrubs because of the Cup.
But like anything else, you should play to your strengths. It's just a lot easier to play M2M, unless you have a real matchup problem.