I think adding grid lines (toggleable) when setting up structures on planets would be a nice addition as a small change.
I am confident that there are quite a few other people out there who get a little annoyed when their nice little construction project ends with a few buildings out of alignment.
For example, my whole setup is slight rotated 5-10° but it was the best I could do to make it all nice and symmetrical
If people think this is a helpful suggestion, I will submit it in the player feedback and suggestion or small things section.