Lots to respond to:
Eric, I too have..."seen" the recreation of the original staging in a mid 90s tour that starred Marcy Harriel as Maria (she was quite good), (hope you know what I mean by "seen"...it's a rare find, but so worth it!) Unfortunately, I don't remember it that clearly...I remember thinking that the dancing/action could have been improved during the "Schirzo," I was surprised that they just ran, trying to find "somewhere." I mean, I guess it makes sense, but the difference between...me playing it (never actually in a production, both cut it), and how it was staged was just very different. Still, I think the ballet and "Somewhere" into the nightmare is still brilliant...even though Carol Lawrence nearly broke her neck during rehearsal, I love the fact that Tony and Maria are carried off and that's how they can't be together--perfectly acting out the situation, that their "friends," situations are forcing them apart. A great abstract.
Re: first time leads got to dance, that's just something Carol Lawrence had said in an interview, I don't think I've seen any other confirmation. Still, I think it is what you were saying, it was probably the first time two LEADS were allowed to dance the dream ballet.
I agree that the movie does do well in placing the boys in "America"--in our high school's production, we too added the boys in. I don't think it's too much dancing, the Jets dance "Cool" and the Sharks don't have to, and that's one of the hardest dances in the show, certainly the Sharks could handle "America."
In terms of the switching of Cool and Krupke, I'm not entirely sure about my feelings. I know...for the MOVIE, it definitely worked, and had to be that way. I guess I generally agree it might be better that way in the show, but I did read a surprising argument for the original placing. It was very convincing...but maybe not that much if I can't remember it...but I remember thinking the person had a point, I swear!
Eric, very very very unfortunately, I will be terribly surprised if anything is done to commemorate WSS' 50th Anniversary.

The same debate we're having here about reviving or revising it has caused such disagreement that everyone won't come together to do it one way or another. A shame.
bbonstage, maybe it's like...we (I hope you too) see that the original production is much better than the movie...but those who see the movie without seeing the original production think it's great. Maybe that's why kringas loved the production, and you didn't. Maybe us WSS fanatics are so...we know what it could be, and if it's not up to par, we'll find it worse than people who aren't familiar with the original...does that make sense? I certainly agree that WSS can be heavily ****ed up if people take it on who do not have the talent to perform it, but maybe so-so productions aren't as bad as we would think they are.
"But still, if after fifty years, we're still doing the same dances, it makes me a little sad."
And I still shoot back with, it makes me a lot sad that I am yet to see a live, professional production of this masterpiece, the way it was done. :-P And again, in terms of doing the same dances...lawsuits. And really...is there any other show that dance is so imperative to the storytelling? Could you really conceive of just how bad a revisal could be? How amazing it would have to be to even live up to the original, let alone surpass it? It's just that perfect, IMO.
"And there's so much meaning in the show that gets lost now."
Wait, I want to clarify...are you saying what you did that what held meaning then doesn't know, or that productions today don't convey that meaning? Big difference. I'd of course argue with the former, but am not in a position to argue with the latter.
"If the anger at authority the kids had been blowing off came out of them with "Gee, Officer Krupke, F*CK YOU!"
And if the gangs were fighting, they wouldn't be doing ballet turns on the street. It's all part of the suspension of belief, of the particular musical language, IMO. Krupke is a complete vaudeville number. And the silly pun works in terms of ending the vaudeville number. I think changing little things like that pulls the audience out of the suspension of belief, and suddenly just everything like that has to be changed, and I've heard of productions that have tried to do that, that have just been awful!
"because every production is just like every other. Oh well"
And I still stay I'll take that any day over a much lesser, different production. Maybe I regard West Side too highly, but I honestly cannot conceive of a revisal that would be better than the original, or even as good. I can't.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli