The ideas behind the A2 and the new Nacra F18 are not necessarily to punch through every wave. The idea is to get the boat into a different rhythm where instead of leaping over every wave, it alternates between pitching over a wave and pushing through one. The result is that the rig pitches less and you're still not trying to plow the bow deep under water constantly. Moving the bouyancy around accomplishes this task.

Having briefly sailed an A2, I can say that I've never been on a boat that was more silky and silent through the water. It will be interesting to see how the same concept applies to a two person boat that carries a lot more weight.