I was thinking maybe a few new machines and generators might be nice, also smog. Smog would be like a liquid but it floats up. if you touch it it starts to kill you. It would come from geothermal generators and regular generators. you would need an airtight pipe to hook up the generators to. The airtight pipe would be crafted like this: RGR
RGR
RGR
R= G= glass
And a fusion reactor for lots and lots of energy:
And an advanced miner:
The fusion reactor would produce 8000 EU/t! But look out, it explodes easily! The advanced miner would be faster and more efficient.
Just a thought