Unfortunately they didn't plan to make it very friendly for people that like to play it on a LAN, at home, with their family. I recall a time when all Blizzard games not only supported basic functionality like LAN play, but also came with Spawn Installs. However, I guess now that Activision owns them, they can do stupid stuff like strip out features, oversell the game as three different pieces, and force a constant connection to the "new and improved" Battle.net community.
It's too bad, it looks like it would have been a fun game.