Piracy isn't an issue with what I said? If it just allows a locally hosted p2p connection, but you still need to log into b.net to do so, problem solved. That's not a full redesign of architecture, I'm sorry.
Blizzard are a business, and I would stake my left nut on the fact that they would not take what is probably the number 1 community requested feature, and basically shit all over it and put in a "Players on your LAN" chat channel - if it even came up in a design meeting here's how it would go
"How do you think it will be received by the community?"
"..."
"So let's the arcade?"
Piracy is an issue, because you would only need to spoof the initial b.net authentication then you could play offline with full functionality instead of having to constantly remain authenticated. It makes it a huge amount easier for pirates, so it is an issue.
Secondly having p2p hosting is a huge redesign of their architecture, it's going from a centralized system to a distributed system, I can't see how that's even open to debate respectfully. It's like a website download as opposed to bit torrent.
Blizzard have constantly said that the number 1 feature request by the community (LAN) will not be implemented.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.