It seems to me that a lot of the fan anger is due to Robert Jordan's broken promise. That promise has turned out to be essentially un-fulfillable, even (as Tom and Harriet have both said) if he had lived to attempt to fulfill it himself.
I remember when he first announced his illness, that at that time he basically promised his fans that he wouldn't die before finishing the writing he had planned. His estimate at that time was that the stories he wanted to tell would take another 30 years, so he intended to live that long at the very least.
If he'd been able to keep this second promise, then he would be around to take the flak for the breaking of the first promise, which in my opinion would be right and fair. Robert Jordan, not Tor or Harriet or Brandon Sanderson or the bookstores, deserves the blame for this situation. But fans cannot admit that they are angry at their favorite author who's lost his courageous battle to a terrible disease. So they transfer that anger to others, who didn't make the rash, stupid promise that is now being broken.
I always think it's a bad idea to make promises that are not in your power to keep - promises of outcomes over which the person making the promise has limited control.
I commend Tor, Harriet, and especially Sanderson for their excellent handling of this whole situation which, in my view, was not their fault in the first place. It seems to me that they've made the best decisions they could with the cards they were dealt. I'm confident that they'll continue to work towards getting the best book they can out, as quickly as is practical. But I seriously hope that Sanderson especially will not sacrifice his marriage, his family life, his health and sanity, or his own writing in an effort to assuage the wrath of the Jordan fans.
