Considering that the attack which took place nearly 3 years ago was an open challenge to the Army engaged in a major anti-insurgency campaign in the 'tribal region', a very strong official retaliation against terrorism would have been expected by observers.
The Wikipedia article on the December 2016 Peshawar Army School attack gives a list of steps taken in response by Pakistan to combat terrorism:
[Extract] Pakistan responded to the attacks by lifting its moratorium on the death penalty, intensifying the War in North-West Pakistan and authorizing military courts to try civilians through a constitutional amendment. On 2 December 2015, Pakistan hanged four militants involved in the Peshawar massacre, whereas the mastermind of the attack (...) was killed in a drone strike in eastern Afghanistan on 18 October 2017. The Supreme Court of Pakistan upheld the death sentences of two more convicts involved in the attack (...) on 29 August 2016.
Detailed information regarding action taken is given later in that article.
Pakistan also created a National Action Plan in response to the attack.
The National Action Plan is an action plan that was established by the Government of Pakistan in January 2015 to crack down on terrorism and to supplement the ongoing anti-terrorist offensive in North-Western Pakistan. It is considered as a major coordinated state retaliation following the deadly Peshawar school attack.
How have expert political observers evaluated these actions taken by Pakistan against terrorism since December 2014 in response to the Peshawar Army School attack, and what is the published opinion of senior political experts regarding the efficacy of such measures?
Note: kindly try to support your answers with adequate references to avoid any possible objection of being "primarily opinion based."