Leaving the island is really the only thing that makes sense. I mean once you start doing the side quests you kind of come to realize that the people on the island are pretty fucked up mentally, seriously everyone is either on a lot of drugs or someone spiked the water.
They really kind of took a massive left turn in the story when it came to the 2nd island, like out of no where you kill Vass and you have that super awkward talk with him when he's shit faced. Seriously, why not make these characters semi likable instead of them acting like stalker ex girlfriends? Dennis calling me after every mission on the 2nd island and basically being like...."you belong to us, to citra, fuck your friends." I'm sorry what now, no thanks.
Even then maybe it would be a harder decision if the tatau gave some kind of real mystical power instead of just being "gamey stats". Like if Jason had dishonored style powers from the tatau or something along those lines...because really a lot of the things Jason gets to do would in any other game be attributed to experience/learning.