If you are having fun with 2 pistols... then have fun. I don't think there is a right way to "play." If you are working with a team that has objectives and people are counting on you... well, that's a different story.
I used to play paintball competitively and every once in a while we would enter tournaments with pumps. We usually lost but damn, winning a game against a bunch of guys throwing down 2000+ rounds a game was hella fun and we usually had loads of people watching and cheering. Effective? Hell no. Fun? Hell yeah.