The only thing i don't like about B Wings is how slow they are. Whenever I play against them with faster ships, it isn't too hard to exploit their slowness my rushing into ideal positions for flanking, etc.
I mean, they have the 3 bank and 4 fwd, but they are Red. Once the B Wing is stressed, they only have 3 options for distressing, making action denial pretty easy. I suppose this only matters vs lower PS ships.