Question: What would you change, if anything, in the original 1961 film version of West Side Story?
My answer to the question is this:
I would not change anything in the original 1961 film version of West Side Story, except when Tony, despite what he told/promised Maria about stopping the Rumble from happening, would've been one of two things:
A) Just plain not going to the Rumble at all, thus letting the Jets and Sharks have it out with each other regardless of what happened.
B) This would've been an even more sensible thing for Tony to do: Tony should've gone to the Rumble, and, instead of trying to interfere with the Rumble when Bernardo and Ice had started to duke it out with fists as planned, allowed Ice and Bernardo to duke it out with their fists as planned, and then, as Bernardo had wanted to do, fight Tony. Had that worked out, and Tony had fought Bernardo during the Rumble by duking it out with fists, despite what he'd promised or told Maria, Tony and Maria might've been together, nobody would've been killed, and the Jets and the Sharks might've formed a truce, and eventually become friends.