Fair point. How fast/reckless a driver could you be in one of them? I know the obvious joke is 'well you couldn't speed if you tried' but dangerous driving, as we know, isn't down to speed, but inattentiveness. You can drive like a nun at 29mph and damn near run someone over because you're in a world of your own, or cruise down a completely empty straight well-lit motorway at 95mph, and you know who'll get penalised as the 'dangerous' driver out of those two scenarios.
Imagine a British built 3-dr Corsa-esque or similar car, all safety gear removed so you cock up on a bend = you face the consequences. 70mph speed limiter, functional, simple trim level, wind up windows, pop-out style rear windows, large glass area with nice slim pillars, no parking sensors or any of that rubbish. Skinny tyres and no power steering and a decent size wheel (so people can learn HOW to manoeuvre a car, like used to be taught, NOT to dry steer the chuffing wheels, it's bad practice) Little 3cyl revvy engine, manual box of course. I'm not laying this down as a concrete list of what it 'should' be, but that's the kind of thing I'd see it as.
I suppose the counter-argument would be that soon as someone in one of these is hit by another driver driving their Lexus SUV and killed, the Government gets sued by the parents, because they wanted to buy their child a nice 'safe' Civic Type R, but I don't know, a man can dream, I suppose...
Either that or just increase the minimum length you must take of driving lessons to a compulsory 1 year and 25 hours, or similar. And a re-test 1 year later, or something. The thing is the stuff you can scrape by without knowing now is ridiculous. Just keep taking the theory test until you pass through blind luck, same with the hazard perception. Click the screen once every 5-7 seconds and I flew through with a pretty high pass mark. Seriously. Stupid!