Yes, with two minor caveats -- probably too minor to merit half the number of words I'm about to spend on one of them :-).

1 As I already mentioned, the same concerns may apply to some of the other people you listed; I haven't checked.

2 I'm still there bulking up your list of people worried about "this eternal September business", even though what I was expressing concern about was something more specific. Your edit means that you aren't misrepresenting me any more, but it's still a little odd. Imagine, to take an melodramatically exaggerated example, that a creationist website puts up a list of "people who think Darwin was wrong", and one of the people on the list is, say, Richard Dawkins. Even with a note explaining "Specifically, thinks that science has moved on since the 1850s and we now know lots of details Darwin didn't" his name would be out of place on that list.

The reason why #2 is not a big deal is that, actually, I do think there is a real possibility that (even without deliberate attempts to grow) LW -- or any other community -- will suffer from "dilution" over time. But that isn't what I said in the discussion you linked to :-). (And I certainly wouldn't say that it's likely to destroy LW, or anything like that.)