Actually, I found the square top to be more tuneable with a combination of batten tension (mine has RBS epoxy battens), downhaul, outhaul and mainsheet tension. Once you dial it in to your weight, the wind conditions and your sailing preference you can move out well.

As far as the PN hit mine was built to less than a 5% size increase so the adjustment is minimal..something like .005%, no big deal!

And yes the top of the sail does bleed the wind gusts but you have control over how much with your top batten tension.

One thing I do notice is the boat sails more balanced. Ever been on an upwind tack in heavy gusty winds with the stock Hobie sail...for me is was up and down..up and down...all gone now!

As with anything new there is a learning curve...remember your boat remains stock but you are changing the sail aspect ratio, the material and the design configuration. All of which has an affect on how your boat will behave. Learning was a good part of my first year..still continues but it is rewarding...Sail fast, Tom G