HUH 2.0
BC have like 16 dungeons and only 3 was about orcs. 2 zones - which ones? Hellfire and shadowmoon? Really?
And what zone in Cata you count? Twilight? Its pretty balanced with dwarves, i say. Thrall - agree, he was in 1 zone, was 1 quest chain, and final raid. Thats all? Where is your Tyrande fatigue, if you that selective?
MoP was about pandaren and mad Garrosh in 1.5 patches. Lei shen? Mantids? Yaungols? Sha? Nope, orcsorcsorcsorcsorcsorcs yes?
Its like complaining that in MoP 4/5zones was about pandaren. Its logical that Outland (orc homeworld) in BC (mostly about demons, blood elves and Illidan with his demons) have some orc presence, no? WoD fitts too. But we have also arrakoa in Arak, we have ogres in Talador and Nagrand. Whole draenei zones Talador and Shadowmoon. But you forgot it. And yes, mass killing enemy orcs have 0 value to Durotar orc place in story or characters representation.
And now where is yout troll fatigue, there is always some troll stuff in every expansion (apart DF, but it is not over yet). Where is your human fatigue? or NE and BE?