When Isle of Siptah was in its early access period, it became clear that the original intent of the map (being a more hardcore focus on PvP with the means to facilitate contact between players) was not working out as intended due to it being extremely grindy and in many cases simply not fun. So they ended up changing a lot of the map to better fit how people normally play which meant:
- They removed maelstrom damage to buildings, so players can build in them. I believe it still gets attacked by the maelstrom monsters though if they spawn near enough.
- They put NPC camps in the game so players weren’t forced to grind ??? essence for leyshrines in order to get good thralls.
- Added the two southern islands with more content for PvE
That being said what the clan your describing is doing is a clear violation of the ToS so what you can do is report them via Zendesk and they should get their entire build deleted and all of their stuff that wasn’t on their body removed.
As for the map itself its still IMO a downgrade in terms of content/fun but the items and gear you can get in that map are the best in the entire game and any hardcore PvP players will always start on Siptah to get the gear as its very much OP. Some can even argue for PvP official that Siptah is pay to win cause of how strong the gear is.