>>36771405Frlg kanto and sinnoh did the post game islands thing which is good too.
I think the key here is having some locations thematically disconnected from the main region.
Hoehn lack this with its tropical climate, unova second half has good content but felt hardly disconnected and kalos is a mess.
Alola with its varied islands is quite good at this, but suffers from having barebones routes.