I second this.
Horde players have been annoyed at Vol'jin being the warchief since the end of MoP, and now you would get angry he didn't get the same treatment as Varian.
This doesn't make any sense. I think it's clear that Varian's death is way more important than Vol'jin's. The troll hasn't done anything ever, probably Blizzard realized it, and put Sylvanas in his place; I dislike her deeply but development-wise she is miles ahead of the troll guy.
On the other side, you have Anduin taking Varian's place. But Varian has been one of the leading figures of the game for quite some time, so it's fitting that he dies fighting and saving his people.
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Also this seems about right.
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I think it speaks for itself that one of the very few monument the Horde has is for a guy that first corrupted his kin disregarding orders, then when he cleared his mess said "I freed myself!" like the most selfish person ever.