Except to the extent that the trust instrument otherwise provides or where the joint action of the settlor and all beneficiaries is required, during the time that a trust is revocable and the person holding the power to revoke the trust is competent:
(a) The person holding the power to revoke, and not the beneficiary, has the rights afforded beneficiaries under this division.
(b) The duties of the trustee are owed to the person holding the power to revoke.