Priebus will also probably receive the majority of the WH blame for the healthcare failure. In Trump’s eyes, Priebus owns the Congressional relationship…its largely the only thing he brought to the table. Trump certainly can’t accept any blame so its all going to fall on Priebus.
His job function was liaison to the sane wing of the party. Since the discovery that there is no sane wing of the party, his job is redundant.
On a serious note, once Priebus is out I think we’re down to Bannon and Kellyanne. I think Bannon will leave at some point out of disgust (incredible I know, right?) but think KAC will stick around - Trump needs her to humanize him when Ivanka’s not available / unwilling. That means more room for the likes of people like The Mooch. This first 6 months have only been a pale foreshadowing of what is yet to come.