By the way: the whole discussion (a few pages back) about 4e classes / powers being all the same is not valid from a conceptual point of view.
I (over)simplify:
Looking at a magic missle and saying: "This is no different than shooting an arrow, so what the hell? The mechanics behind classes is all the same, it doesn't matter what you play!"
That is just wrong from a conceptual point of view.
You look at a power or a specific partial mechanic, which means you don't see the whole picture. But the whole picture is something that you can only grasp as a combination of everything.
It is almost as if you say: You draw a line on paper, I draw a line on paper. It's all the same, right? Maybe it is in this case, but:
You draw a picture, I draw a picture. Even if we both draw the same subject, the whole thing is gonna look very different. And that's how 4e classes differ.
And the essentials will introduce even more diversity.