This is somewhat true but it looks like for persistent worlds more people still play the old NWN rather than the enhanced one. The other argument is that a re-release would breath new life into the game by drawing new and old interest to it.

The conclusion is that technically NWN2 already has a restored multiplayer but it's one that you can't pay extra money to use, but you can donate to the maintenance if you really want to pay someone. In essence it functions equivalent to the list already available but is a separate list, some servers even broadcasted to both lists simultaneously.

Beamdog also uses a new master server list for NWN EE which seems like it was made with the technology for the replacement list. You can also use the Skywing client extender which is recommended to reduce walk animation stuttering, the extension uses a new master server list.

The multiplayer does still work but you either need to direct connect or connect from your server history tab.