Replaced failed strutrod poly-bushing today - Took video of working suspension

I think I see what you're talking about. The sway bar mounts are just bolted to the outer flanges of the K member, if you haven't seam welded the K there will be some flex there. Even with a seam welded k I would expect some flex there, I suppose you could further gusset those mounting points.

What sway bar/bracket is that?