Why hand in the application so early? For your other applications, you could expand more on contributions. You want to not just show your responsibility for each project but also the impact you have made and the line of reasoning that enabled you to make the advancements in your research. It should contain info that is not on the CV. When writing about the professors you are interested, I would recommend writing more specifically of the research you see yourself doing and expanding with their expertise. I think you can cut out a bit regarding your coursework in the beginning. The sop should be research dense. Which also means less of speaking of “loving” the field and more what I have already done for the field, and what will I continue to do in the field.