If you're looking for ideas to throw in (though I certainly don't want to see all mods become the same
) you could always use my Colony Tech Mod (prevents cheesy colony tech trading between empires of different planet types)...
edit: and to curb cheesy population trading, you could make breathable planets *different* from nonbreathables, not just better - maybe you get more pop space, but you get less cargo and/or facility space since the population tends to spread out?
[ December 22, 2003, 12:36: Message edited by: Ed Kolis ]