Honestly, this is just so, so baffling to me. Draka has fuck-all to do with anything or anyone. Nobody cares about Draka, nobody WANTS to get to know her. She is utterly meaningless and unimportant to the lore.
Trying to make her into some major player in the Lore is just a dumb move.
My personal pick would have been having the Four Horsemen be our "guides" into each of the four new Covenants, as that seems a lot more thematically appropriate. But hey, aside from looking super weird and blue, seeing Uther again could be exciting. A good Maldraxxus counterpoint to that, in my opinion, would've been Alexandros Mograine. He would've had far more to offer the story, and brings a reputation with him all the same.
Or hell, if they really wanted an Orc, why not Orgrim Doomhammer? Hell, his name is practically a perfect fit for a "Necrolord". I could also see Grom Hellscream (which admittedly, I'd be excited for, if only to hear his WoD VA pick the mantle back up).
Draka is just SUCH a weird choice, I can't possibly imagine what they hope to achieve, other than some forced "mother-son moments" with Thrall at some point.
Eh... I dunno. Just seems like a wasted opportunity, and I have zero interest in "learning more about her plight".