Southsun Boat gone?
The Southsun boat was replaced with the Asura portal.
Via the Asura Gate: West of Consortium Gift Shop, east of Claw Island Portage waypoint.
Your question’s been answered, but just for the curious, the portal was there but broken since Lost Shores, then the portal and boat were both available since the Secret of Southsun release, and now (as of today) the boat moored at Sanctum Harbor instead takes you to the Bazaar docks for this release. I rather like the progression.
Oh yeah thanks forgot about the portal on the southshores.