Thanks, those graphics take longer than they look sometimes with all the fancy space age animation layers going on haha. I've been using Asesprite because no way do I want to go back down the blender rabbit hole just yet.
Regarding your question, the only things you can't get from space in the base game are fruits, uranium, stone. I know that there are mods out there for a stone-like asteroid, which also gives you small amounts of uranium, and so thought I'd do my part to have a space equivalent for fruits for those who are interesting in making a fully self-sufficient space ship that can make all the sciences. What else are you going to do in the end game lol.
Let me know what kind of cross-compability stuff you're thinking, my quality seeds simply detects any plant prototypes, and adds recipes and cultivators for them procedurally. So so long as you define your plant prototypes early enough, they should show up. =-)