"it's a scale trait, it's very pronounced in most Corsairs so if you don't like it stay away from them."
Yikes! And I just picked up a TF GS corsair a few days ago!
The wiggle does not bother me other than it just looks weird. I am not sure how one would add braces for support. I would think make sure that the linkages are good and tight and you could seal the gap on the control surfaces if you are worried about flutter.