more work it is basically what Anne is telling us. But at the end after you have corrected any mistakes found and you get a good grade you will be deeply grateful to those people who took the trouble to find those flaws and let you know.
Whether you consider yourself a strong writer or not, writing will be there throughout your life, so it is important to develop the skills that will make a difference on your future essays. Whether, one writing process or style works for you, it is fundamental for writers to find what works best for them to obtain the desired result and it could mean a difference in your grade. I have found what works for me by breaking my process down into steps, which has helped me also to point out the weakest points I need to work on to improve my writing skill.
