When I had a problem with wobbly spurs on my Rustler it was because of a defect in the slipper. Never had a problem with the spurs themselves. You just want to make certain that the problem is with the spurs, or changing to 32p won't help.
I guess it could be a problem with the slipper. I was hoping that the 32p gears wouldn't care as much about a little wobble if they still wobble. The larger teeth should have a higher tolerance for what an acceptable spacing is, right?