Thanks John...As my campaign is centered around flying cities and flying sailing ships...I'm already leaning towards the "spelljammer" type theme, though I'm really after something that feels more like swashbuckling during the age of sail (only in the skies)...rather than delving too deeply into space travel. That will be an element much further down the road.
( I absolutely loved spelljammer btw)

There will still be SOME ocean/sea...but I imagine that global sea levels suffered a dramatic drop when a great volume of water was lost...I am not going for the desert world at all...so the gods ARE doing their best to preserve what they can...problem they have is that it's another "alien" god that has caused the damage and they are in a struggle that prevents them from turning their full attention to rebuilding. There are no further impacts...I was mentioning impact craters because I would like them to become some of the elements of the map.

Thanks for the reply.