After the awesome display of maliciousness and savagery Species 8472 wrought against the Borg in "Scorpion". This episode I think fails to deliver as a righteous follow up for Species 8472. It also falls flat (to me at least) where they tried playing up the Cold War paranoia theme between Voyager and Species 8472.
I think this episodes loses strength because we see the VOY crew talking to other humans (Species 8472 in disguise) in a civilized setting. Had it been humans talking to those ugly, possibly stolen from Babylon 5, "your galaxy will be purged" aliens we saw in "Scorpion". I think the peace between VOY and Species 8472 would have had a more profound effect.
What do you think?
PS. Neutering is not my word. It was Nick Sagan who described it as such. Here's a passage from Memory Alpha from the "In The Flesh" page. I think it illustrates what went wrong in the translation of this episode from writing to execution.
"At first, the episode featured a large-scale, interstellar conflict. "The way we originally conceived that story, there was going to be a big space battle," said executive producer Brannon Braga. "We realized that this should not be a story about a space battle, it should be a story about discovering peace between two paranoid races who were thrust against each other by a common foe, the Borg. Suddenly it became a very Star Trek-y episode." (Cinefantastique, Vol. 30, No. 11, p. 29) Nick Sagan concurred, "The original idea didn't end quite so 'happy happy.' The so-called neutering of 8472 wasn't supposed to happen [....] The original story as I envisioned it had just kind of a moment of realization of 'maybe we're not so different,' the hint that there could be some possibilities. But then reinforcements arrive, and Voyager has to escape, and who knows if we've actually done something good there. But once we got involved, I think Brannon actually wanted to resolve it."