I think people assume too much regarding Clark Hunt and his alleged behind the scenes work to find a GM. No, I don't know people inside the organization, but I have worked at higher level/operational organizations and the assumption is always "they HAVE to know what's going on...the boss must be acutely aware of the problem and is working a solution."
More often than not, he is does not have the accurate read because the very people who need to be removed are helping him define the problem. I say this especially in the case of bosses who are hands off and put a large amount of responsibility for running the show on their subordinates.
I don't think Clark is on the verge of firing anyone. I don't think he's even begun to explore potential GM or HC candidates. On one side he's witnessing a stream of Bloody Sundays, and on the other he's got Pioli telling him the "way ahead" out of this mess...probably throwing RAC under the bus, I'd guess.
My guess is he's just begun seeking counsel outside One Arrowhead Drive with some of his father's old partners. We won't see any movement whatsoever until most likely post-Super Bowl. Just my guess.