Yes, we need a new Declaration of Independence, because the current United States government has become far more than what it was that the founding fathers thought was so unacceptable about England. Taxation is much higher today than it was in England or from the King. Americans need to remember who they are and what they stand for.
Stating that you feel a new Declaration of Independence would mean that you would want to become independent from the current government. Unless you are of the successionist philosophy, a new Declaration of Independence is not needed. We could argue that parts of the constitution could be rewritten/updated, but that is not the Declaration of Independence.