It doesn't seem that mining has any meaningful impact on the game, nor any unique repercussions or possibility of varied outcomes from what you do. It's funny that we got a retooling of the BGS, but every change of any significance is around combat. Everything other than combat is just trading with extra steps. I hope that chapter 4 is not the last we'll see of Frontier's enhancement of non-combat activities, and I hope we'll see further development of the BGS soon.