RE: Longer Flybar
Decreasing weight will increase your cyclic response. Increasing length will increase your cyclic response. The same weight farther out will decrease your cyclic response.
However, flybar stiffness has a lot to do with the equation so lengthening it may make it more flexable thereby loosing any advantage.
Bottom line, to incrase the response just run lighter paddles, or if possible, up the flybar ratio, some designs allow this, some dont.