Yeah, I think that's partially accurate. I think the player who did Teddy and original-blend Narcissa understood the game dynamic pretty well, but she clashed with some of the other players (and when she left, she took some friends with her, like the people who played original-blend Crouch, Reg, and Michael).

I never really understood what original-blend Pansy was trying to do and had a very difficult time playing Draco opposite to her (they were supposed to have grown up as friends, but Pansy was always pretty combative with him at all times).