For the waterfall scene - couldn't we combine the two ideas and have Marion drive off directly into the river then have the three falls be cut together quickly. This way we still avoid the DUMB tree limb trick and still increase the danger of the waterfall scene that was so bland in the film.
As for the title...I think I'd prefer to just leave it. Not because I like it, but just becasue my plan was to just slip this new DVD into the case and act like the other never existed.