I can easily distinguish Durotan, Grom, Gul'dan, Kargath, and Ner'zhul in this picture. But I always forget the other two. I know Kilrogg is another, but I have trouble recognizing him and the last one.
I don't think the colour palette is diverse enough. There are lots of colours across different zones in WoD, but this just overflows with red-orange-brown. I would have spread the blue orcs out a little bit and stayed away from all the dark tangarine/brown. The work lacks depth because of it, I feel. Your technique is remarkable, however, and I love your work. I just think the colour palette adds some confusion - especially compared to your Cataclysm/MoP work. You're awesome.