Ok here's my take on the diagram.. I am gonna shoot it to ya straight cause that is what ya asked for..
I had absolutely no idea what you were trying to point out with the blue lines marked A,B,C, and D until I studied this diagram a little harder and saw a referrence to the letters in the second set photos. You should show the vane length and height measurements in the same drawing (represented by the red lines)
The whole thing is rerally busy in my opinion. Remember the average archer is going to be looking at this and the simpler you can keep your drawing and still get your point across the better.
I would recomend losing some of the bullet points you have pointing to different places on the vane and put a short paragraph explaining the important features of your design at the bottom of the page.
One other thing that is really not communicated here and this could be an addition to your narrative. Just what exactly the archer should expect from this vane? Tighter groups do to increased spin? Flatter shooting arrows due to reduced drag? See what I am getting at here?
Bottom line keep it simple as you can while still communicating the highlights of your product. Hope this helps...