I guess the longer wheel based cars are more balanced handling wise, and you can spread weight across them better when you're carrying ballast. I'm still unsure of the insignia, it may be a grower. Clarkson wasn't too kind to it, given he's turned into an Opel/Vauxhall lover this year. Remember how Clarkson slammed the Vectra VXR for its woeful understeer and poor dynamics. Just proves a race car is no yardstick for it's distant cousin the road car.
Astra sport hatch would make a handsome beast, but I suppose the men in suits will have been tinkering with the regulation books again to justify their existence and inflated salaries.