Actually, if you look at the specs of most of the wakeskates, they'll be three stage. Off hand, I can't even think of a wakeskate that has a continuous rocker.
I don't know the specific reasoning for three stage working so well vs. continuous. My guess is that that rocker pattern is more conducive to poppy ollies (that abrubt style board release). Three stage rocker patterns have been used on wakeskates as long as I can remember.
Anyway, don't let the three stage throw you off. It doesn't feel crazy when you're going wake to wake...to me, it's nothing like going wake to wake on a wakeboard.
anyway, stick with the three stage rocker pattern!