Its a shame they didn't replace the cool wall with something similar or another cool wall for two very good reasons:
1. It provided us with a lot of memorable Clarkson moments when he goes barreling into the audience to argue with them. Its really a great bit of interaction and usually very entertaining.
2. In essence the cool wall was actually a bit of a quick review of a lot of cars at once. I mean sure they didn't road test all of them or anything but at least we got their opinions on whether its rubbish, cool, good to drive etc etc. Now that its gone I feel they simply don't mention enough new cars anymore.
Funny how taking something like the cool wall away can actually really change the show.
"Am I a pencil? Am I a cauliflower? Am I a nuclear power sta-- I'm a gearbox! Oh, heavens, I'm gonna swap some cogs around!"