Romney went too far. His actions in OH could've cost President Elect Trump the nomination because it kept Kasick in the game. The two coup attempts....both at the convention and close to the election were either at Romney's behest or at least his blessing. Romney enabled the NeverTrumpers, including that scheme of having a third party candidate to siphon off Utah votes. And now, he'd leave those whose careers are hopefully ruined by following his lead ( Sasse maybe salvageable, Kasick, Ayotte) He isn't even loval to traitors who followed his lead.
Romney is the snake of Trump's poem. Its nature doesn't change.
Trump will do two things during the transition: Get the right people into the right jobs, and neutralize the opposition. In my opinion, this Romney stuff is more of the latter.
Why only make appointments when you can humiliate people who deserve to be humiliated?