Actually I can understand why it might be difficult to implent such idea into the game and I wouldn't count on that too much.
First of all some people prefer to leave serious matters outside of entertainment. Putting names of famous persons in-game, like Carrie Fisher f.ex, is one thing - making a graveyard of people like us, our friends, acquaintances - it's something else. Not everyone likes to be reminded of their mortality while playing games. Devs might not want to mix such heavy topics into something that supposed to be relaxing, lightweight entertainment.
I would probably get seriously depressed while visiting such place. "Those people played Elite and died". Even thinking about it makes me want to quit and go for a walk with my wife. It might be good thing, actually, but not a reaction that developers of commercial product would aim for, you know.
There's also another thing > who's going to choose those to be commemorated? If I die today, tomorrow nobody in game will even notice, and even if someone will, he might think I just stopped playing Elite - My wife would not think to log here to tell you guys I just kicked the bucket, as she doesn't know or care about these forums. So, probably only people who are active on social media will get the chance. That sounds rather unfair, so it should be open for everybody to add their candidate. I might want to commemorate my father, mother or brother. Or... well... someone's cat. The list, when opened, will get long, absurd and probably (let's be serious - certainly) trolled. Will you need to provide death certificate,or will I be able to add ants from my recently deceased Ant Colony?
Therefore I understand why FDev simply cut this idea short (naming stations after cats) and we probably will not see anything like this graveyard in game. Much less headache for them.
Maybe it will be possible with the ability to create your own stations...
But,
why don't someone make something like this here, on the forums, instead? It should be heavily moderated, to allow only meaningfull entries (250 pages of "that's sad" and "my heart is broken" could be a nightmare to navigate), but people could share stories of other players who are no longer with us. Pictures, movies, anecdotes. Maybe this could work.