Mini mods

Here's an idea: a series of mini mods which only alter a small part of gameplay, that individual players can pick and choose from to create their own version of the "perfect" game.

Here's a few ideas for minimods (some of which I may have seen elsewhere so forgive me if I am stealing your brainwaves):

1. Pollution. The conditions of any planet with resource extraction facilities on it will slowly deteriorate towards Deadly. The more resource extraction, the greater the speed of decline.

2. Heavy Armour. Armour components on a ship or unit will actually reduce its speed. This will probably work best when combined with some sort of QNP mod.

3. Population can Repair. As it stands right now, a planet cannot repair any damage unless it has a spaceyard - it can build a new facility from scratch but can't repair a slightly damaged one? So give colonies a small amount of facility and unit (not ship) repair.

4. Ship crew requirements are based on the components installed as well as the hull size.

Anyone else have any ideas? Or care to implement an idea already mooted?