at the moment the final days feels too isolated .You could maybe justify mostly showing Thavnair by sayin that's where our character was at the time making it the only place we would "see" being affected
but since in theory the final days was happening everywhere so everybody sound have a huge mess to cleanup not just Thanavir

This wouldn't be that hard to fix though just find someway to show us how for example ul'dah is dealing with the aftermath.