The “Honor Horde” stuff is really shallow, its lip service. Notice how the “Honor Horde” was not an important factor in the WoT; the outcome of the Burning of Teldrassil; or even Lordaeron. The Honor Horde ceased to exist until it was convenient for them to finally turn on Sylvanas … which does suggest its not really important to whats going on in the story.
The whole Saurfang/Baine narrative is sort of just a placebo on a structural writing standpoint. Its supposed to give the illusion that the Honor Horde has relevance, but in reality it was only allowed to once it was convenient for whatever story they’re telling with Windrunner right now (it IS why they killed off Vol’jin in such a haphazard way … to set up her actions and activities in BfA).
The Honor Horde is no more important to this story than the Alliance tbh … we’re all victims of a single story revolving around a single character (and the narrative will bend over backwards to support that). She is like 95% likely to succeed in whatever the hell she’s doing, largely due to plot convenience protecting her (as what she’s doing will likely setup another expansion).