I think the complicating factor in this is figuring out how to lead a target -- it's hard. The primary intuitive feedback -- the black impact puffs -- seems to be an outright lie as to whether the shot actually hits.
So you have to start by guessing how much to lead your target, fighting to keep it lined up as it maneuvers, while watching your cbills with the corner of your eye and trying to keep a queue of how much you were leading the target if and when your cbills increase from a shot you fired several shots ago -- and this must be learned for different projectile velocities, pseudo-multiplied by different distances to target, pseudo-multiplied by different velocities of target (correcting for maneuverings). (All while on a field of combat, with any of a dozen known or unknown hostiles potentially cresting a hill, lining you up, flanking your position, or tearing through your front lines. Tunnel-vision will get you or your allies killed, after all.)
We need more prominent feedback. Crosshair hatches, crosshair color, sound, a fix to the black puffs, something. (The line reasoning being: If things get exponentially more difficult the more we are expected to keep track of, improving just one thing can help substantially.)