Lumia

we can delete them if we have a big ol' Asulonian boat trip to new lands in which neither race already exists

That still wouldn't solve the problem. Mori and Kharajyr exist. Even if we take a boat to leave Asulon, khajary and mori will just get on the boat with us.

from what I'm aware, the mori would be quite happy to see a significant decrease in the number of people traipsing about their rightful land.

not sure about the kha's, maybe they would just stay and inherit the entirety of asulon for their own purposes (excluding the elven island perhaps, but who knows)