A few suggestions strike a note with me, mapping options, seeing where I've been and what I've discovered, those are great ideas.
Most of the rest, well, I'm on my way out across the galaxy right now, left out last night and already hit undiscovered systems within 400ly of Sol, which blew ME away, just goes to show you, you never can tell. I've already been to Sag A* once, 2 months of travel time, 70k LY distance traveled, thousands of systems visited, and almost every single other suggestion has me shaking my head because of one little fact...
After you've done something literally 1000 times, it's tedious, it's boring, it's NOT going to make the game any more fun or enjoyable or make you feel like you are really there. I explore because I love to see what's out there, 400 billion systems, 99%+ of which NO LIVING HUMAN BEING HAS EVER SEEN! That's what why I go out into the Black, to see what no one else has ever seen. Odds are extremely high that no other living being will ever see them again, which doesn't matter, because I saw them, and I saw them first, and we humans, we're weird about being first, doesn't matter the context, we like to be first, I'm no exception that to and this allows me to get that in a tangible way, my name gets put on those things I saw first.
I love the scenery, the awesome views and visuals that I find out there in the Black, but if I had to spend an hour or two every single time I went to explore a star or planet or moon or asteroid belt(yes, I scan those as well quite often, I know it's worth nothing, it's just a RP thing for me), I MIGHT be 400k LY from Sol right now, maybe, there's a lot of systems in that short distance you know, including ones not yet discovered. Another few years and I MIGHT make Sag A*, maybe, if I hadn't already gotten fed up with the game and stopped playing because there's only SO much repetition I'll put up with, and my limit for that is pretty damn high in video games, still, that's beyond my limits and then some.
Taking soil samples, atmo samples, flora and fauna samples, detailed scans of this and that and the other, all sounds awesome. But stop and think for a minute, how awesome will it be after you've done it a thousand times....remember folks, 400 billion systems out there, impossible to see them all in the human lifetime, but still quite possible to visit thousands upon thousands of them, and doing the same little tasks every single time, eating up minutes to hours every single time...it's not fun after a very short time, it's boring, it's work, it's enough to drive you to head into a sun and see what's at the core just so you don't have to look at that damn scanner ONE MORE TIME!
How is that an argument? You might as well say that game development in general is pointless because nothing anyone conceives is fun for all eternity. Heck, its an argument against life itself:
"Hey, shall we go see a movie?"
"Nah, when you've seen that movie a thousand times it gets boring."
"Okay, how about we grab something to eat at that new burger joint?"
"No, once you've eaten there for a thousand times it gets boring."
"Jeez, how about blowing our brains out?"
"Well, thats one of the things I havent tried yet, but I'm sure it gets old after a while, too."
People are suggesting things they would enjoy doing for a certain number of times. The idea that everything gets boring eventually doesn't really help much when trying to create something...