One of the mistakes that I think that Janeway made in Scorpion was her fairly weak demand that the Borg escort Voyager across their space. It seems to me that if you're willing to negotiate with a genocidal species, you should make big demands. Why not demand that they send Voyager home? They know that the Borg are perfectly capable of crossing the entire galaxy fairly quickly. They could have asked to be sent home to the alpha quadrant if not directly to Earth.