I think you have to understand the history behind SS. Originally, the brand was created by Sonu & Eva Shivdasani, with Soneva Fushi as the first resort. Allegedly they went bankrupt and the resorts were, mostly, aquired by Pegasus Capital who brought in a dream team of hoteliers to revitalise and grow the brand. These included Neil Jacobs (ex FS and Starwood Capital), Wolf Hengst (ex FS), Anna Bjurstam (Raison d'Etre Spas) and Henry Gray (Amanesorts).
Gili Langkanfushi was bought by BS Ong and is now independently run. The original Shivdasani properties were upgraded, but many still do not live up to the 'luxury' label. The first 'new' property was Six Senses Douro Valley, which demonstrates the way forward for Six Senses.
Sonu Shivdasani retained Soneva Fushi and Soneva Kiri in Thailand and then went on to open Soneva Jani in the Maldives. These resorts have nothing to do with Six Senses now.