"there will be plenty of opportunity in the near future to add to the list, as more manufacturers attempt to climb on the 'green' bandwagon by producing underpowered cars on skinny tyres"
You mean like an Appia or a Mini? Having fun with cars requires neither copious power nor prodigious grip. Its part of the reason why small cars, and modest sports cars like the MX-5 (which was deliberately engineered so that it didn't have too much grip) are so much fun.
Moreover, if anything, the concentration on fuel efficiency has sparked innovation and produced better cars - reductions in weight, better small cars (Mito anyone?), higher-efficiency small engines with double turbos or turbos combined with superchargers - if anything cars have got even more interesting because small and light and nippy are all in again. Which brings me back to the original 850 Mini - 34 bhp, skinny tyres, and an absolute hoot to drive. I know, because I learnt to drive in one!
In contrast the Chrysler Neon drank like a fish, had a horrible slushbox, vague steering, a noisy engine which delivered power about 5 seconds after hitting the throttle, and the most godawful interior I have ever clapped eyes on. I have driven some pretty awful (dis)courtesy cars in my time (Mk1 Seat Ibiza, Mitsubishi (absolutely no) Carisma) but the Neon was truly the most awful and frightening machine I have ever had the misfortune to take the wheel of.
Oh, and sack Clarkson.