No. If the first investigation was flawed then the conclusions are flawed. If the conclusions are flawed, then we don't know what caused WTC7 to collapse. That is why we need a new investigation.With a lack of physical evidence to support the idea of CD, a new investigation is somewhat futile.
Why can't 9/11 truth disprove the NIST report thus supplying the necessity for a new investigation?
Newton already did (figuratively speaking). You just ignore this.