I’ll listen to it again and make refinements there! I definitely intended the twitch to coincide with a burst of static/voice, but maybe as I was tweaking it I made it too subtle!
Hm, you do definitely have something there already- I guess to me it needs to mean more to elicit that big a twitch. Adam Driver is reacting to the shock of his only lifeline to the Light Side/Redemption closing (at least for now). Obviously without giving away the full Palpatine reveal we can’t replace it with anything too dramatic, but perhaps there’s a way to draw out that twitch reaction in a way that feels natural. Again, maybe voice would be more effective, even if we might not fully understand it.
And I can hear those Sith whispers near the end now that you mention it, definitely make those a little bit louder.