On the cusp...

[Ballbarian]

My only complaint regarding the map generation is the lack of options. Not that the maps it usually generates are bad, but it would be nice to be able to generate a land only map, or lower the ratio of mountains to plains and similar.

You already can!
From the main menu, select 'Game Tools', then select 'Random Map Creator'. From there you can set map:
width/height
province count
sea%
mountain%
ruggedness
rivers(not pretty)
impassable mountains
and finally antialiasing.