Your car feel rock solid because you just moved the limit up higher where you don't usually drive it. Push it at the new higher limit and you'll find it's not so forgiving as the stock setup was at the lower limit.
It's discussions like this that I like to bring out this old quote from CAR magazine Kelley came across:
"The Impreza is an enormously dangerous car. Not dangerous as in unstable, unpredictable or prone to bursting into flames. No, an Impreza will not kill you, it will get you to kill yourself. This car is, put simply, almost too good at what it does. Too much for any mortal on (just about) any British road.
Driven fast, the Impreza feels like it’s hoovering itself to the ground, impervious to corners and crests. It feels so normal and stable, that you drive faster to increase the risk quotient somewhat, to get the adrenaline coursing. And then, when the buzz of overtaking helicopters wears off, you notch it up some more. And all the time everything is stable and normal, and CRUNCH…for the only inevitability about an Impreza driven quickly is that if you believe its flattery for a moment, a very heavy impact will be your reward."