An expansion seems like a good idea. One idea is to focus some on the aliens and increase their variety. Specifically make different types of them of them that live in different terrain types or perhaps that would be randomly chosen with new maps. For example sentient plants, rock creatures, humanoi...

the Factorio planet on Biter's planet. Hmm I think the Factorio planet needs a proper name: Factorium? Factination? Factinogo? None of these seem quite right, I'll be interested to see what creative ideas the community generates :D If we want to go traditional I our planet naming structure it would...

That empty spot above the armor looks like a great place to put a player portrait or something else to further identify you.

If that doesn't work another weapon slot is always good.