Again I admire that nothing escaped your critic's eyes and how you've put them down in words. I agree with your points regarding the earth and blood. Thank you very much for taking the effort and time for writing such a detailed critique
First, this is a very interesting concept presented here; the idea of having earth (living earth) as an intact, but bleeding heart, the text underneath - many, many philosophical implications which is simply great. Another thing which is good about this is the simplicity - everything, from the picture to the drop of blood to the script is bold and crisp with clear contrasts and edges. The grass, earth, blood, the colours look very fresh and powerful.
However, I also have a bit of negative feedback about this: the focus may be a bit shifted due to the brightness especially of the greens; they distract a bit from the subtle brown earth which can have a disruptive effect on the overall harmony. Furthermore, while the droplet of blood in itself looks good, it is very clinical and "artificial"; the shine of the metal edge invokes this even more. Maybe toning the shine on the metal down or starting the drop really inside the heart would work less "artificial"? This could also make the plastic look of the heart stand out more.
Another good thing about this: The text being grey and the edges of the whole picture being softened is very pleasant and relaxing for the eyes, as are the shadows around the heart. It gives off a very harmonic vibe.
Again, strong message combined with strong images; apart from the two mentioned things, I have nothing to criticise.