He may have possibly made this move to make the swamp monsters think they are making progress in infiltrating/manipulating him, or perhaps to use Priebus to ease the process of getting his agenda pushed through asap. We simply do not know.
What we do know is 1) it’s very difficult to “figure him out” and 2) Priebus’s very first misstep will find him tossed out “like a dog” (an expression DJT likes to use).
HOPE yer correct..... stay safe !