Imo one should keep in mind that the 'n word' issue is most of the time presented in US context. While there are similar slurs in some other countries with considerable black minority or considerable racist sentiment, it isn't the same phenomenon. I think that it is entirely unrealistic to change the taboo as things are in the US. Ideally, of course, there should be no taboo terms, because as long as they have power they continue to be used as a weapon by racists. I think it will take a few decades - at best - for this to start happening in the US, though. Afaik some attempt at this was made in the 80s-90s etc, but obviously it didn't actually succeed - remember the Kramer stand-up?

(Kramer being a crap comedian aside, having a term be something like a hammer hit is not a good state of affairs).
There are many reasons for the US case being different. For starters the US has a very populous minority of black people. Furthermore the black population there is used in a number of foundational claims or (up to) myths, re the civil war. Lastly, the black people shipped to the US faced hellish situations for many generations, so it is expected for them to feel they deserve some very prominent compensation. Problem is that while it is perfectly expected of a past victim to feel this way, it isn't possible to practically lead to much gain when victimization has lessened very considerably by now - of course there still is victimization; one only needs to see how US cops act when they approach a black suspect, at a number of cases leading to said suspects death when he wasn't even armed or posed a thread.
I am not optimistic re this issue being solved in the near future. Besides, the US is so polarized than even far more straightforward issues cannot be solved.