How to get rid of "waggle" w/o sacrificing ride?

[bcfromfl]

Just purchased a '15 Nismo a week ago, and, in general, am very impressed with the suspension. However, is there an "easy" fix to moderate the lateral "waggle" like after you jerk the wheel back and forth quickly, and the front and rear floats a bit before returning to center? (Don't know if I'm describing this well.) I like the vertical spring travel and dampening...just not the horizontal looseness.

I watched the Z1 video about subframe collars, and that sounded interesting, although they seem more appropriate for squat and wheel hop.

BTW, the car does not have the front spring spacers.

Thanks!