It looks like you allways have to have 1 active quest and game tends to stick you with one of the main ones once you're done with a quest. I've been trying to get rid of them by focusing on them. You get blueprints etc as well. The base quest seems to be endless with the so called data recovery and what not.
I've been trying to get rid of house and specialist BS
worst part is I'm stuck with 1 of the main quests where I have to complete 2 missions for Gek but the Gek missions I finish from the mission board doesn't interract with the main quest and doesn't count towards it's progress so I keep getting the 0/2 Gek missions completed stuck forever pretty much
there are so many bugged quests with missing NPCs, you can abandon and restart some of them but it doesn't work with everything