The big thing that was missing in my mind was dangerous/hazardous/violent stellar events. Like asteroid impacts, comets, dangerous black holes, asteroid collisions, supernovae, meteor showers, rogue planets, etc.
The procedurally-generated nature of the ED galaxy is such that irreversible dynamic events - like two planets smashing into each other - are impossible. Stars, planets, invisible comets etc all move about along their Newtonian orbital tracks and can never deviate from them. The Stellar Forge ensures that it never generates orbits that could result in collisions.
A realistic depiction of supernovae would not be very interesting. You'd see a star, then boom, you're dead as the shockwave hits you at the same time as the light from the explosion. A few years later, the shockwave then reaches the nearest stars, which might or might not cause issues with any humans that have colonized those stars. Now, they might be able to have some CG/II events related to supernova evacuations, both from the initial explosion and in a few years time from nearby affected star systems, but actually watching a supernova occur is never going to be possible. Changes tot he galaxy map cannot happen in real time, they have to happen when the servers are down. So the best you could hope for is the announcement of an imminent supernova, on Thursday at 0700. Thursday 0700 rolls around and it's the weekly server maintenance downtime, so everybody is logged off. When you log back on, hey presto, the star's exploded.
Meteor showers are of course created by comets, which are in game but not yet activated.
Rogue planets are discussed heavily in
this recent thread. They may exist, but if they do, they are like comets and are currently invisible.
In real life many of these things would be rare but they could be increased in frequency in the game so people could see them once in a while.
No they can't, they really, really can't. Supernovae occur in the real-world galaxy once every 400 years. Having them occur every six months or whatever would be completely unrealistic. Yes, "it's a game", but one of the big selling points of this game is the rather realistic galaxy simulation. You are asking FD to put an awful lot of work into creating a series of handcrafted special events that makes the galaxy
less realistic, when they're trying really, really hard to make it more realistic. Sorry, but that's just not going to happen.
Actually some systems especially the closer you get to the center of the galaxy would probably be very fast moving and dangerous.
Unfortunately, stars moving relative to each other is one thing that cannot be realistically included in the ED galaxy simulation. All stars in the galaxy are fixed at their XYZ co-ordinates and can never be moved. So yes, out there in the real world, the region of space within 100 LYs of Sag A would be "dangerous" and "interesting", with all sorts of stuff flying about at a significant fraction of lightspeed. But it cannot be made so in ED.
I'd really like to drop into a system that is in the process of forming planets.
T Tauris and AeBe Herbigs are protostars; these are places where planets are, in theory, still being formed, This is represented in game by numerous and thick asteroid belts present in such systems. We'd all like to see actual protoplanetary discs or something more interesting added to such systems, but actually watching planet formation, particularly the whole smashing-planets-together thing, isn't something that's achievable in ED.
Also, does the Sol System have the asteroid belt, Kuiper Belt, Heliosphere, and Oort Cloud? How detailed is the depiction of our solar system? Because there's a lot of very interesting regions. I'd really like to experience flying through the termination shock and bow shock of the Heliosphere.
All real-world asteroids and most comets are not included in Sol system. Halley's Comet is there, but (as is the case with all comets in ED) it is currently invisible. The Kuiper Belt is represented by a dozen or so KBOs - Pluto, Sedna, etc - and the as-yet-unsighted Planet IX, dubbed Persephone, is in the game as a large ice planet. There is no "electromagnetic structure" to space in ED, so things like the solar wind, heliosphere, the Jupiter-Io flux tube, Van Allen radiation belts and electromagnetic bow shocks of stars and planets do not exist in the game.