This is also suggested ages ago.
Retro missions don’t seem popular, droid raids are even less. I don’t think a unique mission type located at the other side of galaxy will encourage anyone to fly there. There is technically key rush…
Something similar is buried deep down the multiplayer ideas from the times when we had no multiplayer at all. There was also that epic suggestion of a giant boss that would only be possible to defeat with many players at once playing in co-op.
If you look into older suggestions from 2018-2021 you will find a lot of stuff that is likely to address your points. Kokokokos has even made a monstrous list of suggestions liked by iA when he used to do that, while iA mentioned multiple times that the Todo list for CIU is bigger than Everest and is hardly organised.