Most of what you stated is opinion and not fact. I can appreciate you don't seeing an elf leading the Horde, but this is no longer Warcraft. The story of this universe has progressed quite a long ways. At one time many probably wouldn't have seen the elves as being part of the horde, or the forsaken being part of any faction, or even the night elves being part of any faction.
The horde of yesteryear is not the horde of today.