You don't need to do that if you believe what you offer is much better than what you get. And I believe everyone has different perspectives and ideas, some of the applicants are on their last step of materials editing and they may no enough time to redo something.
There is no right or wrong answer about the essay writing so everyone just need to show what he wants to show. Be yourself is good enough. Sometimes when you receive too much feedback, maybe you'll lose your own style.