You just said it yourself. You want it because you "know" it. It's the same reason fans clamor for things like Beastly Kingdom, Western River Expedition or The Muppet Movie Ride. They've seen concept art, they understand the concept and the "know" it will be good. With Radiator Springs Racers many have even experienced it so they know it's a safe bet.
People loved The Hangover, then when they made The Hangover Part 2 they took the same model and made the same movie in a different location. They went with what people wanted and the movie sucked. Fast forwarded to The Hangover Part 3, they changed the model, kept the characters the same and the result was a movie that was substantially better than the 2nd.
Let's face it, we don't have Imagineers on these boards. We're uninventive and for the most part we lack creativity at the level that Imagineers have creativity. As such, I'll defer to them to "wow" me with something else rather than repeat what they've already done.
As for comparing it to it's west coast counterpart, yes that's inevitable. The safe way to avoid that is to reproduce the exact same thing. However, if that's done then my guess is we would only see Cars Land, and not Star Wars Land. Is that a concession you're also willing to make?