It's a little lame to always have to worry about over-colonization penalties isn't it? Especially on larger maps. That's where this mod comes in handy. It reduces the over-colonization penalty and increases the over-colonization threshold on most planets. Add to that, there's a rebalancing of several different factors related to population and you're set to expand your empire massively and take advantage of those big maps.
Credits: [TG]Gobnil