The stealth makes it worse than an F-16 for anything that an F-16 currently does. Stealth means you made huge sacrifices in armaments and performance. It carries much less payload and what it can carry is extremely limited.
I mean.. I could almost see it being useful to replace the F-16CJ for the SEAD role, since to get the SAM system to target your F-35, you have to modify it to use a lower bandwidth like the Serbians did, but that's hardly a big advantage. Our adversaries already upgraded to track and target these stealth aircraft.