I would not mind a lot more navigational hazards and effects on travel
- Gravitational pull from a black hole
As has been noted, the pull wouldn't be a danger, but there are other black hole effects that should become extremely dangerous as we get nearer to their Event Horizon. But they shouldn't be inherently dangerous from the drop-in point - our FSDs shield us from many of the effects of these in Supercruise anyway.
- Dangers of accretion discs of a black hole
This would be mainly extreme temperatures as you approach the inner part of the disk. I agree we should have them because they'll look AMAZING, but they'll only be dangerous if you go close enough to middle. They shouldn't be too dangerous on the outer edges, for example - just a dusty asteroid field, probably.
These are actually already in the game. Look at a star for long enough and you'll see a flare come out of it. They're not quick and they could probably be larger, but they do spike your heat a bit. They should be more dangerous in normal space. Again, our FSDs spacetime warping effects shield us from most of the harm.
- Stellar gas clouds in nebulas with different effects (Corrosive gas, sensor dampening, lower laser efficiency...explosive gas pockets)
I don't think these are scientifically plausible in space... Nebulae are less dense than our atmosphere. The Thargoids do seem to leave behind a local gas cloud though when they attack ships, so maybe these things could be added artificially. Again, the danger would only apply in normal space.
- Ice crystals with pockets of fluoroantimonic acid (explosive effect when in contact with water so mining lasers can set them off)
Not sure how accurate it would be that these volatile gases would be present in ice rings, buy it does sound like an intriguing idea to add some more tactics to mining.
- Meteorite Storm (Causing shield/hull damage in SC)
Again, our FSDs shield us from these. Besides, the types of things are so small in scale that we would be unlikely to ever pass through them when travelling at Supercruise speeds. For instance, try being accurate enough to hit a station at 30km/s or 1c, or 10c.
- Varied jump fuel usage depending on star size and/or black holes (More fuel to leave a system of a large star and less fuel usage at leaving smaller stars)
- Varied general fuel usage in SC when going away from a stellar body depending on gravity force (Gravity modifier as a percentage of added fuel usage perhaps)
These are good ideas. Though the way the FSD works probably mitigates any extra fuel consumption beyond what it needs to run itself.
- Non-Static asteroids moving around in a belt or ring
Asteroids aren't static. They spin and they orbit their planets in the ring system. The reason you don't see asteroids smashing into each other is because they've done all that millions of years ago and reached an orbital equilibrium. When you drop into a ring system, you are orbiting with the asteroids, and you move around in their frame of reference.
- Asteroids being affected by kinetic force (shooting one with missiles and making it move or colliding with it)
Asteroids are heavy. Most of them are bigger than Anacondas, I don't think we have the firepower to produce enough thrust to move them. Remember, they're orbiting a high speed around their parent planet as well, so you have orbital momentum to contend with.
- Mining an asteroid making it move as gasses are freed basically creating a jet stream
Same reasons as above. However,
destroying asteroids or breaking larger chunks off of their surface to cause a dangerous debris field would be fun.
- CROWDED stations with a LOT more ships around them with queues and huge bulk carriers in orbit outside of it
- Tender ships and small shuttles moving around to move cargo between bulk carriers and stations
- Tiny ASTRONAUTS moving around close to landing pads and outside station hulls (making repairs and such)
Yes, all of this. Make stations feel more lively.