This is a victory against a piece of legislation that was overreaching, potentially harmful to entirely innocent parties, and could have caused censorship across the internet. A lot of people (mostly reddit users) seem to think that there is now some automatic right to download shit for free whenever you want, and we should be protected by law to be able to do this. That's just greedy entitlement. And that's not what this is about. Everyone deserves to be paid for their work, whether it's you, me or a corporation (which often employs people like you and me anyway). The point in this case, is that authorities went too far down the road of infringement of people's genuine rights in trying to protect corporate profits.
I'm sure there will be those who disagree, but taking other people's work without their permission isn't morally justifiable whichever way you try to spin it. Regardless of who made it. And that's not what we should be fighting for. This is not, and should not be a "victory for piracy". It's about our freedom as individuals not to be treated like de facto criminals by our own governments.