I've been DMing a Homebrewed setting (Based loosely off of Eberron mostly because it has a cool map) for half a decade. I've run almost a dozen games, one going from level 1-20 and am about to start my next long-term game expected to also go from 1-20. I'm trying to further the worldbuilding so ask me anything and I'll make the answer canon.

I've completely re-mapped all of the magic schools to ancient domains that coincide with the great draconic gods

These gods are linked to the angelic host, the moons, the planes, and even special artifacts.

My party is going into the Lhazaar Principalities on a pirate-like campaign before venturing into the Mror Holds and Karrnath to discover more about the world.

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Link to the map: https://static.wikia.nocookie.net/eberron/images/f/f4/D&D_-_4th_Edition_-_Eberron_Map_Khorvaire.jpg/revision/latest?cb=20090819121531