More rock in the bottom of frame would be preferred as it look quite unbalanced as they stand.
My concern is / was that so many amateur photographers simply line up the head / eyes with no regard for the rest of the composition, and that's why you can so oft' tell a manually focussed camera system; a professional from an amateur.
A pal of mine swore he could tell negs shot on Leicas whilst working at Magnum 25yrs ago. Now, having owned and used 35mm and MF rangefinders extensively and also systems such as the D800 with long lenses, I wholeheartedly agree. So when I see what seems to be an AF camera with a long lens, this central focus point and what to my eyes seems to be a disregard for the full frame composition, I try and point this out.
Not knowing at the time what you shoot (I now do), this shot seemed to fall into that category to my eyes. It's a feature I see in wildlife and portraiture and to a point, landscape images all the time and caution my students against disregarding the integrity of the entire frame. I ask them to switch to manual everything and the improved results follow.
In my defence, I too fall into the same trap with the D800 / 200mm lens combo for some mountain landscape work, and one reason why I dislike taking the long lenses out on shoots with me.
The boat shot, to my eye, looks more balanced with around 15% shaved from the left of frame.
All the best.