Maxperson
Morkus from Orkus
Meh. If adding slave race status to kobolds, something that isn't even hinted at previously isn't a change then I'm not sure how adding one more moon is a sudden radical change to the extent that it makes Greyhawk not greyhawk.
They were used to serve dragons in some early adventures.
Adding an island is an addition. Adding the Isle of Dread is mixing two different settings together, which addition or not, breaks the setting.Never minding adding the Isle of Dread to a previously unmapped part of the setting somehow isn't an addition but is a change.
Kara Tur and Zakhara are 3e canon. They are sub-settings that are limited to a country or two, and are written into the FR. Mystara is not a sub setting consisting of a few countries. It is a full fledged setting world.Does that mean that adding Kara Tur to FR makes it not FR?