I think he is advocating a cost effective, low hanging fruits so to speak, in the next iteration of a Pakistan "owned" jet (2040s timeframe). See what Korean did, a reduced rcs jet without internal bays. Maybe with a bigger engine things can work out, put an internal bay (mind you they are not new, see the 1950s Delta Dagger F-102). These are interesting ideas.
The history of PAF tells us, it has always needed a workhorse, if you think post 2040s that will be a Chinese off the shelf or Turkish off the shelf, you are mistaken. The J-35/31 is not PAF owned and the TFX is a heavy weight so it will not be PAFs workhorse.
Work on the Jf-17 started in early 1990s, and we had our first squadron in 2010. Work on the next "work horse" will need to start now to have a first squadron in 2040.