To have a steep drop at the beginning, and to have a bigger tornado would be almost impossible, the tower would have to be bigger than Vanish Point's and there wouldn't even be enough room in the first place.
And yes, CC is one of the longest rides in the park, right behind Big Daddy Falls, but that's just because Big Daddy Falls has a lazy river in the middle of the ride. It is around the same length of both Aquazoid and Meltdown though. All of the smaller slides are no where near the length of CC. But, I do agree with you, while the actual ride duration is pretty long, the ride goes by fast, mostly because it is so fun, and fun things always go by faster than not-fun things, if you know what I mean.