Yes I was thinking the head
might open up somewhat when sailing. Also, we have a hydraulic boom vang
which will keep the boom up in the situation where you took the photo
so the sail doesn't have the weight of the boom which will make the head look different. I think the creases might go away when you lift
the boom or sail with more wind
I still wonder how the leech will behave in higher winds, like 25 knots true. If it opens up too much even after increasing luff tension, you know you can have stiffer battens. A trick often done in that case is to make the back-end stiffer by taping a piece of batten onto it (like the aft 2/3 of the batten). This is like simulating a tapered batten.
But overall, I think is shape is good, it looks a lot like mine (from Elvstrom-Sobstad). Also, if you had laminate before you will love this as we don't have a single
spot of mildew on it after 4 years. The laminates we had before looked black like carbon sails
because of the mildew between the layers....