I don't think rocker has much to do with it. I land out in the flats no matter what board I am on, from a Absolute Platinum, Motive, Byerly, Fish, Roam, Era, Player, etc..., it doesn't matter. Try riding out further before your approach and edge all the way through the wake. I can land in flats on pretty much any line length from 50' to 85', the longer the line the more speed I end up generating. Now if someone could tell me how to stop landing in the flats that would be good!
Also what wake are you on? I ride behind a SAN 210.
In summary I think it's all technique, not equipment.