Hey Hal
Grabbing your whole saga ATM to do a run through. I've avoided it until this far simply for one fact... I was like 12 when AOTC came out and as a result have a guilty pleasure love of lightsaber Yoda...
Reading through this thread, it appears the Vader "No!" could be your most controversial decision across your edits.
Out of curiousity, did you do anything to that audio to make it sound slightly less cheesey?
I was thinking maybe you could add some form of radio interference, as if his use of the force was affecting the mechanical systems that allow him to speak and breath.