I was just expanding on the idea of mining is all. I used Class 7, as a the upper limit to mining worlds basically as a balance reason. I was brainstorming about how you could do different things with a mining/resource mini game. How would the worlds be different. giving choices on what to mine, how to mine.. ect. I just picked 7, as that is about average between high pop, and low pop worlds..
As it is now, you see a class 10 or 15, or 20 and get excited right? dual class 14 planets is a score.. But seeing the lower class planets are sometimes just a let down, this would be a way to make them more interesting, and perhaps mini gold mines so to speak.
Perhaps you have a class 15 heavy grav world, the system has a gas giant that you can mine Argon.. (maybe argon is a gas needed to make a certain laser) I know off topic, but if they add resources, they should be pre-reqs to build things yes? trading resources could be another level of depth to the game. And lastly the system also has a Class 5 that has high iron content, which is perfect for shipyards..
Now this system is unique, in the sense it would be a perfect system to set up a war operation. Class 5 with mining pumping out ships in the orbital shipyards/ the argon lets you build the new Death laser! and the heavy grav world, those soldiers you are sending off to concord worlds get bonuses to attacking/defense.
Also just fyi, mining worlds would be like a normal world, but the mining operations would take up tiles, and add alternative effects, slower growth perhaps, or other things that would make you decide if it is worth exploiting the resource, or not..
Or perhaps you find another system, and in this one it has a class 20 world, a gas giant that is a carbon-dioxide mine, and maybe an ice world, that has uranium. Perhaps this combo, could be perfect for a growth world, ship in the carbon-dioxide and use it to power algae farms. The uranium could give a power boost to run more algae farms, giving rise to a hyper growth world. .
Think about when you land on a planet and get one of those choice options. for good/evil choice. mining planets could be the same thing. things like Mining with low proticols, could reduce population growth. Or perhaps risky worlds, or radio-active worlds have other negitives.
the idea of mining them for me is is to make it deeper basically a simple "asteroid" mine that exist now. Add some depth, and choice to how the planetary systems are, and give enough options to make the world's/systems unique. Instead of how one system is pretty similar to the next as things are now.