Good.
There's no need for human orcs, when we have humans. That's just making the races, and the factions, bland.
You, guys, keep forgetting the description for the races, and the factions, just because of a few characters:
"Joined in an alliance of convenience", "ferocious, and sometimes monstrous", "struggles to keep aggression in check".
Orcs - "The orcs can work themselves up into a
natural bloodlust frenzy, a capacity that was only demonically amplified by consuming the Blood of Mannoroth." Meaning, they never required the Blood of Mannoroth to be savages, as can be seen by the Warlords of Draenor expansion. To be honest, Garrosh epitomized what it meant to be an Orc Warchief.
Troll - "Other than tribes such as the Darkspear, most trolls will attack outsiders on sight, even trolls of other tribes. The jungle near Booty Bay in the Eastern Kingdoms is infamous for its many aggressive jungle troll inhabitants. The Darkspear tribe practiced cannibalism until they joined forces with the Horde, who forbade the practice". To be fair, Zul'jin is the best example of a troll character.
Tauren - Now, tauren are said to be calm and peaceful. And that is true, to a certain extent. Being based on native americans, they are considered 'savages' in films like Pocahontas. In warfare, i would say, they are immensely brutal. Baine is the worst example of a Tauren. Even in warcraft III, his ass got kidnapped by Centaurs. I would have added some of that alleged 'savagery' of the native americans to the Tauren race. Not just peaceful and serene people but, rather, deadly in combat.
Undead - evil beyond comprehension. This is undisputable. They experimented on caged living beings, deployed plague indiscriminately, and raised creatures into undeath. The Banshee Queen is a great example of a forsaken (before being warchief).
Blood elves - Unlike the High elves, they embraced the overuse and indulgence in arcane magic, to the point of addiction. Now, that the Sunwell is restored, they are no longer power hungry. But, what characterized their addition to the Horde, for an entire expansion was their fel green eyes and their withdrawal symptoms that they shared with the fel corrupted orcs. I think Kael'thas Sunstrider epitomized the Blood elves as a race.
Goblins - Assholes. No doubt about that. They primarily think of monetary gain, before they think of their allies. They are greedy creatures, with a knack for explosives. This can be seen by their starting zone, which shows the use of slaves and the disregard for others' well-being. Gallywix is a prime example of a Goblin.
Pandaren - not gonna even consider them, as they don't really fit the Horde. Heck, their racial leader was brutally beaten by the Warchief. The Zandalari were their enemies, during the Zandalari Wars, and i can't see how they would ally themselves with the evil forsaken, greedy goblins, magic-obsessed elves, voodoo trolls and war-like Orcs that, frankly, resemble Mogu.
In the end, the Horde and its races have always been "evil", sort of speak. And that is not a bad thing, like you all consider it to be. That's actually, a good think. Because if both factions were good and benign, Warcraft would have been boring as hell. That's the diversity part of it, what keeps it interesting. Would the Forsaken be interesting if they were a kind-hearted race? would the Goblins be goblins if they were not greedy pricks? Would orcs be cool if they were compassionate, flower-picking, individuals? i'd bet they wouldn't. That's what the Alliance is for. And they can be bad too, in their own way. By being fanatics. By being Xenophobic. and by being condescending.