@Anwar: I don't think that the Borg are the supreme species of the galaxy, and I agree with you that it is extremely likely that there are stronger species than the Borg at least somewhere in the galaxy. With that said, was it really necessary to make the Borg look this defenseless? To be honest, I can't really answer that question because I have mixed feelings. On one hand, turning the Borg into victims of an even more powerful species leads to the inevitable team up between Voyager and the Borg, which as I said in my short analysis makes for an interesting story because both groups are entirely different from one another. It takes the threat of an even more powerful foe in order to get them to cooperate, and I think that makes for a good story, hence why I gave Part 2 an 8/10.
So, going back to what I was originally saying, I'm not entirely satisfied nor am I entirely dissatisfied with what this 2-parter did to the Borg. Overall it made for a strong story, but I can't help but feel that my perception of the once mighty and powerful Borg has been altered for the worse.