Firstly, let me congratulate you on digging up a thread from 6 months ago.
Sarcasm. Why shouldn't I answer a 6-months old thread? What is your problem with it?
Secondly, looking at your concerns, it might be best for you to not play this game, but Space Engine instead, which might be more to your liking in terms of realism.
Straw man attack. I wasn't demanding the game be made more realistic, I was merely answering the OP's question: 'What takes you out of the game?' I didn't ask for a volunteer moderator to patronize me about what is reasonable to expect in the game. This thread isn't about the game as much as it is about defining astronomical realism.
Layout of star systems: Erm, strongly disagree. Within the bounds of what might exist in reality, there is a lot of variation. From systems with no planets to multiple star systems with really crazy configurations. Maybe you need to explore more.
Sarcasm again: 'Erm'. One of my specialisms as an amateur astronomer is measuring the changing separations of multiple star systems. They can joust in very thin ellipses about empty(?) centres of gravity. Also having attended lectures given by astrophysicists working on exoplanet exploration, I know something about it. I guess it doesn't really come across in the System Map view, if the system configurations in ED really are wildly eccentric. As an explorer in Elite Dangerous, I've visited well over 5,000 systems from one end of the Galaxy to the other, if that's a fair representation.
Milky way bigger: Erm.... its modelled on what we knew when FD rolled the dice a couple of years ago for the final time. There was some news last year that scientists thing the galaxy is bigger than initially expected, but FD can't reroll the dice for the whole galaxy each time some new info is discovered.
Sarcasm again: 'Erm....' When I was a boy the Galaxy was about 100kly across. Today it is thought to be 100-180kly across. Both figures are bigger than the ED Galaxy. But it wasn't important. I wasn't demanding it be changed. I know full well the die has been cast. That's why it didn't even occur to me to mention the great cubic blocks of blue stars to be found towards the Core.
No globular clusters: Probably never will be now, since the dice have already been rolled. You'll have to live with this one.
I'd already made up my mind to. Again, I'm just answering the OP.
Alien habitation: Umm... you know those lights are from human settlements, not alien right? They only occur in inhabited systems. And so far, we cannot land on those planets. If you are seeing night lights on ELW planets outside the bubble, then you should report it to FD. I've seen plenty of ELWs outside the bubble though, and never seen this. If you mean there should be alien habitations on ELWs outside the bubble, then not necessarily, depends on whether FD add alien species besides outselves that can survive on ELWs. The Thargoids apparently can live on Ammonia Worlds.
Sarcasm again. Straw man attack again. As if I really think that the night lights on ELWs in the Bubble are put there by aliens, or have seen them outside of the Bubble. I merely thought to put out the idea that it would be exciting if not realistic to discover night lights outside of the Bubble in-game. Many players live in hope of FD including alien life forms in future, and even expect a Thargoid storyline at some point.
Anyway, you note your two main issues, the former, if really an issue, needs reporting to FD, who presumably are aware, but if you feel strongly about it, report it anyway. HUD is probably here to stay for a while, change your HUD colours if you wish.
Neither is what might be considered a high priority issue though. Things to be dealt with on an as-and-when-possible basis.
I have already reported these issues to FD when I first encountered them and consider my role in that respect closed.
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Finally, talking of reporting issues, I do still have an issue with the totally unnecessary and unprovoked hatchet-job you just tried to do on my perfectly reasonable, relevant - and I thought entertaining and informative - reply to the OP's thread, going out of your way to comprehensively demolish an argument which I wasn't even making, purely to present the illusion of having utterly defeated me personally, and I resent being tested in this manner. Reported.