One thing that I didn’t see much of in our post is leadership. Ponder what you can do in this area as leadership is very important to WP. While volunteering is important (I saw that you have put in a great deal of time in this area) and valuable, you may want to devote some of that time to developing leadership opportunities for your WP application. They are looking for people who want to be leaders.
And kudos for participating in Mock Trial! (Says the former MT coach. 
It’s a fabulous opportunity and if you do go to the Summer program at WP (SLE), you’ll have a chance to participate in a Mock Trial session.