One Important thing that Nawaz Sharif has to learn with the Time and i hope he has if not too bad for him. NOT TO TAKE PANGA and if he does with anyone of these he will be sorted again, so does not matter whoever it is just do not take PANGA.
Pakistan army needs General Tariq Khan.
General Haroon political man and political family influence, Nawaz Sharif had a lot of bad experince from politically backed people so he also needs someone like General Tariq Khan who can just stick to army and to handle war situation in the country.