I know a little ( emphasise little ) about G-A detection systems of various types, but what with AAA beyond 'small arms', + as you say Manpads...don't recall fast, jamming Tornados doing too well against unguided stuff; though they of course were so low a lobbed brick might have been a problem !
What with all the various options available, from Pilatus to Appache to A-10, not to mention UAV R/W stuff supposedly in the pipeline, can't really see a need for the Bronco.
How does endurance compare to say, the Pilatus ? Of course 2 engines is always a nice touch.
As I recall, one of the objectors to the idea last time was an ex-Bronco pilot...
Shame, as I do actually quite fancy the aircraft, apart from the prop's next to the cockpit !