1/2 Why, in every case here, is engineering the specific kind of variety? Why not a death theme? Or a fel one? Why not taunka, or tuskarr? If variety is the goal, using the same fallback every time doesn't make sense.
3 Why didn't the mission table use tanks, healers, and dps, for example?
4 Why choose to develop that specific type of fantasy over anything else? There are endless choices.
5 Sure, Siegecrafter Blackfuse was an enemy, though. Only now have we gotten access to his technology as players, through the Blackrock orcs.
6 So at this point, you've claimed 6 times that there must be another explanation, but you haven't committed to anything specific. So in that case, why
isn't a tinker an option? Is "cohesion" your only argument? Is there a simpler explanation for Blizzard choosing to feature "engineers" in this way?