We could visit the West Shroud. Or the rest of the Coerthan Highlands.
We could visit Thavnair if someone wants a more "arabian" style than Ala Mhigo which is more Byzantine. It appears that the western regions of Othard have the complicated jungle biome of golmore and the desert of Dalmascan regions, which again, are probably all the coastline between the 3 great continents.

Honestly, raids don't do justice enough to exploration, neither do dungeons. Seriously, the burn was a massive interesting landmark and we visited it as a Dungeon, where 2/3rds of it you are inside reused assets for the most part (average cave, average allag, average xeltaphol rocks) and you barely have a skybox with something interesting on it when you reach the final boss.

This game really needs more meaning and fulfilling exploration.