"Handling" for me is something very subjective. Ie some love the way a standard S2000 handles, some hate it.
Slightly wider tracker can improve feel and grip, which promotes confidence and more enjoyment. Don't read into theory as one rule doesn't cover all vehicles, with different steering and suspension set ups.
99.9% of the time when we see our cars it's stationary and spacers help the look of the Zed no end, worth it for this alone imho.