If the Operative's role is to control midfield, then why don't they have knock back, so that they can utilize the acid pits on either side? The point is, why would a premade team want to enlist an op when they can have an assassin, that can do the same thing (minus the buff), and has knock back, which the Huttball map is clearly designed around.
Why doesn't Bioware make it easy on themselves and give people the option of choosing the WZ that they queue for. That way the people that dislike it, don't have to play and those that love it, can continue to enjoy it. It's a WIN WIN!