Thanks so much for the feedback! I love your idea of having a place to see what's planned, I'll try to get a roadmap up! At the very least, if it exists in another factory-building game, I'd like it to exist here too. That goes for filtered tubes, I just haven't finished them yet :P
Tubes are also very bare-bones at the moment. In your pictures, the Port and Pump are taking from each other endlessly. For now, you can fix this by making the Port into a Pump, but expect a massive tube rework soon! Also, your idea for a Router is actually exactly what I'm working on, I'm just trying to get the resource selection UI to make sense.
I also like your idea of a mining drone. I agree that I'd like to flesh out the expansion process overall to make it less convoluted.
There is a way to deal with the enemies on other asteroids, but it's in Tech 4. For now, just don't research Tech 3 Labs until you're ready to defend; the enemy doesn't spread until then :)
Thanks for bearing with these early versions and getting me some great feedback! <3