Unless if parts from the JF-17 Block I and II could be modified and placed in the Mirages to allow them to solider until we can afford to the mirages. This is if the Block I and II get an AESA upgrade, and we work with Denel to put in the minimum needed structural improvements for the most outcome. The Egyptian Horus mirages point to a desire by the PAF to reach at least the Horus level of capability; such as Night vision for day/night capability if it wasn't present already.
The PAF can keep most upgrades podded for quick integration, upgrades and to minimize costs, but keeping the 6 squadrons going will require a continuation of structural overhauls and replacement parts. Might as well upgrade some parts and structures while we are at it, such as replace some parts with new composite parts. This will decrease the need to find as many spare parts, and seems like a worthwhile project until Block III production starts.
Additional a new Radar will allow us to integrate new weapons without Grifo (Italy) notify its allies, and the information getting back to India. New long range stealthier cruise missiles, glide bombs, and fighter launched drones coudl be compromised if they have to be integrated on the Grifo Radar, while the KLJ-7 being a Chinese radar goes without saying.