The pressure from the US eliminate alot of options for Israel, so it does follow the JV path, but with the US.
for example, the amounts of upgrades that Israel did in the american aircrafts are hundreds if not thousands.
Moreover, Israelies are installing their own systems onboard the american fighters, they may look the same from outside, but completly different than any other variant of those fighters and get yearly upgrades.
The F35I("I" stand for Israel) is being developed right now and the wings and the helmet are made by Israeli companies.
I think this article, is trying to describe the knowlege that Israel posses and the ability to create an aircraft, but US won't let it happen for obvious of reasons.
While US has the F22 as air superiority aircraft, Israelies are "stuck" with F15, ofcourse their are modern versions of F15, but they're no equal for newly made planes.