What does the CFD testing tell us? I don't think it's a race hull, does drag help or hurt how a freestyle ski should preform?
I think the way water flows under a hull makes a bit difference in a freestyle hull as well. After all, the way water hits a rockered nose creates a lifting effect. Using CFD testing most likely helps find that sweet spot, hence maybe the reason there's rocker in the middle of the hull as well. The less drag and more of a lifting/lighter effect would benefit a freestyle ski IMO, especially for combos. You land a flip, and the bottom deck design could influence how flickable your ski is on the next combo. Obviously this would depend on the angle of the ski, but if it was designed solely for freestyle, there could be an industry standard since it seems like pros are able to land their tricks constantly at the same angle each time. Finding that sweet spot could help. I wonder if the three face rocker would influence rolls, since you endup hitting the wake at an angle and such.
This freeform ski looks more like a rec hull though, so high speed runs might have been considered in their testing to create an all around hull.
But that's my .02 for a freestyle hull. I think the less drag, the better. If your design causes a lifting effect, a lightweight material combined with a big power plant could get you a decent amount of altitude every trick and help with more combos.
Edit: I haven't taken a fluid dynamics class yet, so I don't know any true specifics. Maybe freeform or an expert can chime in. This is just my theory.