Again this is pure conjecture. I agree some of the technology from the 5th generation fighters will trickle down in to JFT eventually. The question is when? If it too good to be true it generally is not true at all. JFT in its current iteration is a nonstealthy design. Just adding a few tweeks here and there will not turn it into one. Our needs are many and resources limitedand a new project especially a stealthy design will set us back billions of dollars which we dont have. I think we need to let a simple design remain a simple design. Too much tweeking will break it and the end result will be disasterous and very very expensive. If you look at the Chinese design philosophy and indeed what has been done with JAS39 and F16s it will give you an idea about what is possible without breaking the bank or the plane. You will also realize that a lot can be done with a design without meddling around much and chopping and changing that which works.
So what is possible is:
more software upgrades,
better man machine interface,
incorporation of IRST and AESA.
additional hardpoints ,
mounted POD(most likely on the chin),
CFT,
DERs,
Dorsal fin mounted software on the dual seater.
Engine with more thrust(RD93MA or WS13/15. which ever is better)
. What is less likely to happen is:
moving the wheels towards the wings utilizing the body for additional hardpoints
wing enlargement.
General enlargement of the air frame.
a bigger engine
EU sourced engine.
What in my humble opinion is not going to happen at all.
Stealthy design
A