From their standpoint, the point of it is to try to break it. So I don't really know how much benefit there is into copying and pasting all of your info from last year into it. From ours, it's a way to learn the app better and try to clear up any questions we have about it beforehand. It's not a way to fill out your own application early, just a way to "give back" a little while learning about any changes they made.
Though the email does suggest that you could print out what you fill out and use it to fill out your app during the summer. That might be a nice thing, to have all that info in one place when you apply for real.