It only would make sense for them to send you to specific planets and areas they've been hands on with for the main quest line and some of the more substantial side quests.IMO the 1000 planet thing isnt a selling point. What i like most about games is comparing what different players did working in the same area. I can appreciate what they have created but i would have much more preferred 100 fully fleshed out planets with settlements, cities, etc.... than 1000 when i know im not going to 900 of them.
Hopefully most of those 1000 are just filler with mining materials and skippable junk and there is real meat on the remainder.