I think the establishment was thinking if Nawaz is sent abroad and asked to be quiet it will steer the ship of IK government to calmer waters. Keep in mind at the time of bhagora running away PTI were facing multiple issues on many fronts. Maulana March, breakneck inflation, economy in doldrums, uncooperative judiciary, India and foreign powers breathing down our neck and FATF. With all of this and then Nawaz still being a political reality with millions of paindus still worshipping him as their god so establishment thought it would make life easier for IK. IMO that is why they sent him abroad.
However, one thing establishment forgot to factor in is the resolve of Imran Khan. He is a fighter and does not know how to lose. Systematically he clawed his way back and one issue after another he successfully handled it. He would have found a solution for this fat pig as well if he had not been allowed to run abroad.
Look at the stability of IK government now.... Nobody can remove them and their performance is going into overdrive and that is why you see the desperation of all the corrupt filth.
2/3 in 23 inshallah.