One thing I did not even think about for the Iksar is certain endgame items that they're the only shamans who can use. For example..
http://wiki.project1999.com/Robe_of_the_Azure_Sky
That is a awesome robe that barbs, trolls and ogres can't wear.
Then there are items that aren't endgame but still not terrible, like..
http://wiki.project1999.com/Jarsath_Scale_Leggings
Ogres and Trolls can't use them but Iksar and Barbs can.
This whole which race can use which gear as a shaman has put a real spin on things for me. I'm not sure anymore.