If you are talking about reusing materials such as personal statements and letter of recommendation, it is always wise to rewrite and get new letters.
If you are talking about the actual entering of information again into the application as in having to retype it instead of it carrying over by itself its kind of hard to answer considering this is the first year of the new application platform so we'll see if you can carry over anything instead of having to re-enter it. Personally I had to start from scratch because the platform/website changed.