I dont see a problem with him saying "nigga", since it clearly wasnt meant to be an insult. I say that word all the time ("Wazzup niggah!"), but it doesnt mean i dont like black people, its just a popular phrase. If he gets a ban for this then half the EU1 should get banned for calling archers "my old friendchers".
However he does deserve a ban for all the delaying he did in EU1 and the opening of the gates in EU2.