Yes, really, considering they're supposed to be faceless minions to the all powerful dictator warchief. Instead, they talk back, ignore, do their own thing, take liberties with their orders, like an alliance would. As it is, you see cut scenes with all Horde leaders present, listening to Sylvie's nasal sneering.
Alliance somehow got the blue warchief, aka high king, because they don't give a shit about our leaders. At most, you seen Andy agonizing about whether the Horde will accept his Valentine's cards, Greymane kissing his ass, and Jaina unable to make up her damn mind. The other leaders make cameos at best (Dwarves are AWOL, Mekkatorque does the first thing in fifteen years only to become a gnome-sicle, etc). Everything has to be run past the simpering blue warchief though.