Shahbaz Sharif is a defeated politician...
Had our accountability & justice system been efficient, Showbaz would have been in Jail long ago spending his terms.
He has too much of a immoral baggage to stand tall, he is not a crowd puller neither does he has have full support from party stalwarts.
Khaqan Abbasi on the other hand has support of few heavy weights within the party.
Showbaz is only good at maintaining liaison with pindi, but the present Establishment is not like the one of the past.
Besides when you have a PM with a stature like Imran khan no conspiracy would work.
So Shahbaz Sharif is no issue.