Tried this MatchSprectrum-Toolkit of CurveEQ yesterday to fit several ADR-Takes into OriginalSound.
And really got great results!!
Works fine in offline modus. Of course, needs just a bit of finetuning afterwards, but i propably would never get it that precise and that fast!
(I have to admit, I used it in N5.5, since there are a few issues in N6 which do not allow me to switch my regular work to right now)