Do you think Nexon made a mistake with vindictus?

Some of vindictus is also server sided as well within the player's control.

Party runs are customly server sided, the map runs off of the host's own bandwidth to keep playing and no other players can get into it. Anyone who goes into a party and goes off into a map within that party works their way into the host's own seperate server.

Er... That's not how it works. Nexon is still the "host." The leader of the party is heavily depended upon when it comes to the connection, and unfortunately, strength of their computer to reduce the strain on Nexon's servers. However, Nexon's servers are still the host of the game. Unless you manage to find a way to host a party without connecting to Nexon's server in the slightest bit (which is ilegal), Nexon will always be the host.