Same thought. Mast base too far forward. Try with the mast base all the way back and if that's not enough, move the boom up a bit. If the wind is strong enough, a bit more downhaul will help the nose to lift up as well.
Try first to move the mast base back only and see how it feels.
Thank you Dylan. The new version looks so much better. Especially on the phone, that makes it so much nicer. I love the new features too, they really help to see more details of the session. 10/10 for me.
I'm going to ask the obvious but have you tried to reduced the stab angle? Have you checked you sail trim (different from going upwind or downwind)? And last, your front foot strap position. It's probably worth moving it forward and have a wider stance (more control) if you said you want to do more reaching.
I agree with the others about a shorter fuse as well. It makes life easier on the reach.