It's hardly a track car, especially in estate form, and I don't need to drive one on a track to tell you that.
Driven properly on actual roads, the 280bhp V6 Police spec Vectra C is a pretty effective tool.
You can't drive a powerful fwd car in the same way you would a powerful rwd car. If you do, then you'll be disappointed, as you clearly are, so I stand by my statement that if you can't get it to corner, you clearly can't drive.
This is my experience also. I've never driven a Vec C as such. But I have done around 70k in a couple of mapped 9-5 Aeros over the years, which have similar suspension and power to the VXR vec (275bhp, 400NM ish). I've never found them wanting on the road compared to RWD cars I've had over the years. Overall I would say that the positives of FWD outweigh those of RWD on the road (ability in the snow/bad weather, improved space in the back), but only if you drive them correctly.
Slightly ironically, the only car I have struggled with in snow was an auto 1.9cdti Vec C estate

... Granadas, Sierras, Omegas and Mercs have all been absolutely fine
