I mean… Yeah, I see it.
After all we still don’t have the WC2 Elf stuff because it doesn’t fit Blood Elves or Void Elves. So I’ll never get to wear it unless they add High Elves.
I think the main issue is that they cannot really top the 9th legion set in their minds so they went this route and expect players to just mix and match the parts and wear a tabard.