To be fair I don’t see Blizzard ever removing factions as that would upset large portion of players. Although I do wish they did better Job representing them within the storyline. I do agree they are a relic at this point and Blizzard fails to write a war story in the era where neither side was inherently evil and bad (although at least they tried early on as Both alliance and horde had their fair share of dubious morality moments).
I feel however it’s hard to write in High Elves as a Race without creeping on Blood Elf Identity as both groups differ only in their political views. Something the stories surrounding both groups strongly reinforces as High Elves still failed to build anything for themselves at most hoping and wanting to oust Lor’themar off his seat and bring Silvermoon to Alliance.