One thing I have noticed while playing, is that there is basically zero deviation in resource spawn locations in relation to the star colors. Durantium spawns at red stars, and only red stars. Promethion spawns at purple stars, and only purple stars. Thulium spawns at the small blue stars, and only at those stars.
Maybe mix it up a little, and give at least a chance for resources to spawn around those yellow and orange stars, or for some durantium to pop up around a purple star, etc. Give us a little surprise while exploring sometimes.
As it stands right now, I know to head straight for a red star if I want durantium, and nowhere else on the map.
Just a thought.
Happy Bug Squashing !