The title of this thread is seriously misleading.
He's not actually looking for his replacement. He needs another Assistant GM after losing both Ujiri and Maurizio... All he said was that if he found someone who wanted to come in that was heavily experienced he would consider giving up his post.
Really I can't think of anyone who's available that fits the mould for him to give up his GM spot. I still would absolutely love the circus our team would turn in to with Barkley as our GM. But I'm fine with BC keeping his title.