I couldn't agree less, to everyone against the Cars Land plans..
Its like putting Big Thunder Mountain in every Disney park. Some people may never be able to afford travelling outside of europe, and by putting another Thunder Mountain locally, its accessible for others to enjoy. Its the same with California and Florida. Two completely different part of America. In fact, its 2000 miles apart from each other, and when comparing London to Paris's mere 280 miles distance, I think it makes perfect sense to build duplicate, successfully branded rides.
I think its totally dumb to be disregarding of this proposal. With its success, and Walt Disney World being a holiday makers main point of call over Disneyland California, it makes 100%, no-brainer sense. Not only for a money aspect, but for a customer expectation aspect. As ride enthusiasts, we become toffee-nosed. Just because we've done the rides, doesn't mean the next person has. Give opportunity to others. Hell, I'd be over-the-moon if this ended up in Disneyland Paris!