Even though I know diddly squat about moviemaking and marketing, I could be (and actually wouldn't mind being) of service to you: I have quite a few nice "quality-of-storytelling" arguments against the changes (as you probably all do), I master the French language perfectly (if you need some translators, to maybe give it a more "international" flavor), and I'm a university-trained musicologist used to writing (and criticizing bad music-making, as in the end of the SE ROTJ). If that helps you...