To expand:
Stealth: JSF is susceptible to detection and tracking by IRST and VHF radar, which in turn permits cued search in higher radar bands. Unless its own LPI/radar technology is magically good, it may also be susceptible to detection by modern ESM.
HOBS/EO-DAS: Even if EO-DAS gives reliable, unambiguous tracking of highly agile targets, JSF doesn't carry a HOBS weapon in its LO configuration.
Agility: Case closed last year and confirmed by an ACC officer in November.