Trajectories are more of a symptom of not getting the first couple feet right. Notice the small angle diagram that pops up around 00:20 secs in the video. That does not seem to matter anymore once a free kick is in place. To perform that kind of shot you have to hit it with enough velocity, initially, and it's all about the follow through from there. These aren't the Jabulani's mind you - but FIFA's free kicks seem to have that effect. They need to use the benefits of the "promoted" shot technique, and the system that goes with it, and implement that into the free kicks.