If I build my reputation for any career field at Loreville, Will I have to start from scratch for the entire planet of Hurston? What if I go to another planet, will I have to rebuild it at Crusader? Same for Stanton. When I go to Pyro will I have to start from scratch? Will there be an Intergalactic reputation that will span cities, planets and systems, or even Human and Xian space? Or does my reputation from Loreville feed a bigger reputation that spans different locations?
If I understand your question correctly, this is what we have the global “Bounty Hunters Guild” reputation for. When you go to a new planet and want to partake in bounty hunting career missions for a specific faction (say Crusader Security’s Bounty Hunting missions), they will consider your BHG’s reputation as to what level of missions you’ll see available from them. While we don’t want this to completely circumvent the career ranks, this will give you access to higher level missions from the start, which should allow you to bypass the lower level ranks fairly quickly. (Which is another incentive to move around the system(s) and participate in content outside of your starting zone.)