I've seen that shake on Voyager a few times. It's so obvious. At least when Ady added the shake when the SDs scrape against each other, the actors were all stumbling and falling, not sitting still. Looks good.
The Bossk thing is interesting, but I could see him stepping forward just to intimidate them, with that "glare" on his face. Never bothered me. I can't remember if Ady has commented on that or not.