Well, the plane will "NEVER EVER BE " stealth no wonder how much lubricant (or composite) dream boys would put on the plane
A cow will be a cow
However what the JF17 Thunder could do is following
a) Get a better engine , the engine will naturally enhance performance and payload , more weapons could be carried
b) Alternatively if we can may be make our bombs and missiles which are lighter in weight that works as well
c) The Radar integration with SAAB or Chinese awacs could be enhanced
d) AESA integration would allow it to engage more "ENEMIES" as same time great feature achievable
e) Targeting POD could be enhanced with new POD for ground recon in future
But we can show make the cow , 200% even more lethal